Database Users

(SOLVED) Serious screen problem, please help!

Looks like it was my generic charger causing all the problems all along...
Too high output (6.5VDC where it should be 5VDC)
Ordered a replacement, hoping for the best.
Thanks for all the help!
Sometimes my touchscreen is just perfect. Lately, it's driving me nuts!
When I hold my finger on the screen, the touch screen registers rapid multiple touches. Possibly as many as 10 per second.
This makes dragging and long-press actions almost impossible. Scrolling is very hard and typing is a PitA.
The problem goes away at times but keeps returning. I'm not sure if I had it before the recent update.
At first, it seemed like rebooting helped but today it proved useless.
Anybody, please help!!!!
(phone was used and has no warranty coverage )

dfan said:
Sometimes my touchscreen is just perfect. Lately, it's driving me nuts!
When I hold my finger on the screen, the touch screen registers rapid multiple touches. Possibly as many as 10 per second.
This makes dragging and long-press actions almost impossible. Scrolling is very hard and typing is a PitA.
The problem goes away at times but keeps returning. I'm not sure if I had it before the recent update.
At first, it seemed like rebooting helped but today it proved useless.
Anybody, please help!!!!
(phone was used and has no warranty coverage )
Click to expand...
Click to collapse
Do you have a screen protector on the screen? Sometimes the cheaper ones are too thick and the screen doesn't register touch like it should.

Talonnb said:
Do you have a screen protector on the screen? Sometimes the cheaper ones are too thick and the screen doesn't register touch like it should.
Click to expand...
Click to collapse
Just the one that came on the phone.
Like I said, the phone works beautifully some of the time but registers multiple contacts other times.
I suspect software but it seems I'm the only person with the problem...

do you have a warranty.... sounds like a hardware fault to me.... the only way you can prove it's software (or not).. is to do a factory data reset and then run it with the standard basic build for a few days.. see if you still have problems when you don't have any other apps on the phone.

Do you have wet fingers when you experiment this behaviors?

Happens to me too. I figure its due to gunk on the screen like water, sweat your gf's makeup (a major one)
Sent from my X10a using XDA App

This happens to me too.
Only started happening since the last update so I just assumed it was a bug in the new firmware. It's like the phone lags and then catches up with itself, very annoying.

bushbox browser said:
This happens to me too.
Only started happening since the last update so I just assumed it was a bug in the new firmware. It's like the phone lags and then catches up with itself, very annoying.
Click to expand...
Click to collapse
I think it is since the update. I'd better reset the phone using SEUS and see what happens.
@ everybody, believe me, I have had the problem through a variety of circumstances and no problem with sweaty fingers etc. It seems pretty random!
I don't have a warranty so re-install here I come!

I would definetly try the factory reset first. I have had similiar issues but its only been while typing quickly. It lags a bit and then it all shows up on the screen plus a few extras of whatever the last character I typed was.
I did read somewhere, can't remember exactly where, that because our screens are capacitive they can malfunction. What I mean is this:
"Surface Capacitive touch panels: a layer that can store an electrical charge is created on the glass panel. When a user touches the monitor with his or her ungloved finger, a portion of the charge is transferred to the grounded user reducing the charge on the capacitive layer. The controller calculates, from the differences in charge at each corner and determines where the touch occurred."
Sooooo if say the ground for the screen is damaged then it will not register your touch appropriately. Hopefully it just requires a reset, cause the latter I think would be a tougher fix.
Let us know

dfan, is it happen only when you charge your phone? What charger are you use? Original?

I did a restore but no change, issue still there, it doesn't happen often though.
Dose seem like a bug and it never happened to me before the last update.
Also it happens to me when not charging.
Sent from my X10i using XDA App

very bad.. you cannot drink a cold coke and use the phone. I think that it is a hardware related problem. I was trying to reproduce the same with N1 and Legend (with my fingers flooded) without problems. So.. guys with hyperdrosis keep away from this phone!

No it's not a hardware problem as it only started happening with the last update.
Remember the x10 uses different software to nexus one or desire so can't compare with them.
I believe it's the software lagging, this update is faster overall but just lags occasionally, maybe the next software update will fix it, and if not the 2.1 update should definitely fix the issue.
Sent from my X10i using XDA App

bushbox browser said:
No it's not a hardware problem as it only started happening with the last update.
Remember the x10 uses different software to nexus one or desire so can't compare with them.
I believe it's the software lagging, this update is faster overall but just lags occasionally, maybe the next software update will fix it, and if not the 2.1 update should definitely fix the issue.
Sent from my X10i using XDA App
Click to expand...
Click to collapse
Are you pretty sure?

Tested... it is present on old roms

Well the old roms were laggy as hell anyway. It seems like classic software lag so I still think it's software.
Maybe when 2.1 is released we will find out, or even better when we get stock android running though root, that would clear it up once and for all.
My iPhone 3g also suffered from similar lag issues.
Sent from my X10i using XDA App

brunswick000 said:
I would definetly try the factory reset first. I have had similiar issues but its only been while typing quickly. It lags a bit and then it all shows up on the screen plus a few extras of whatever the last character I typed was.
...
Sooooo if say the ground for the screen is damaged then it will not register your touch appropriately. Hopefully it just requires a reset, cause the latter I think would be a tougher fix.
Let us know
Click to expand...
Click to collapse
Hells yeah I don't want a defective screen or this thing is done!
regarding your first comment, this is not lag. It is like I had a turbo button. If I touch for more than 1/15 sec, I get 2, 3 or 4 letters.
instead of one long press, the screen continually registers new presses, no matter how firm my touch is.
Imagine how much fun it is drawing the unlock pattern when my phone's in a bad mood...

That dose sound different to the small lag I occasionally experience, very odd.
Sent from my X10i using XDA App

I've reinstalled the FW and it didn't fix it.
The other day I had 5 straight hours of rapid-fire screen during which I couldn't even unlock the phone.
Gonna have to send it in for repair. Anybody know how expensive S-E are for repairs? Is it even worth doing?

I have narrowed the suspects down to my generic charger.
The charger I bought outputs over 5V (claims 6.5V) which seems to be the problem since I don't experience the issue when charging from a USB port.
New charger ordered, fingers crossed.
Thanks for all the suggestions!

Touch screen w/o touching?

I've noticed that on my NS, I don't have to actually touch the screen to tap keys. I can keep my finger slightly hovering over the glass and it still recognizes my input. Sometimes it actually causes me to mistype at a higher rate than other phones.
Are you guys seeing this too?
Sent from my Nexus S using XDA App

Glad to see I'm not the only one who's experienced this....I thought I was going crazy. It's sporadic at best, but when it happens it is annoying. I can't say for sure what causes it, but I'd love to hear other people's opinions.

I've been getting this as well.

same here. Guess they have the capacitance set a bit too high.....

yup, me too. infact. my home button gets phatom long pressed and the light is off on it...have to power it off/ turn the screen off and on muliple times. that insanity has occured about 4 times thought.

Thanks for the replies. I went back into Best Buy and tried their demo phone. So either it's supposed to be this way or they messed up a whole batch of phones. I wish I could remember whether the vibrant did this or not, but it's not standing out.

Sometimes touchscreen nonresponsive too. This is not relating to partial outer border touching either.
Sent from my Nexus S using XDA App

kjy112 said:
Sometimes touchscreen nonresponsive too. This is not relating to partial outer border touching either.
Sent from my Nexus S using XDA App
Click to expand...
Click to collapse
I believe Engadget did mention did this during their review @ http://www.engadget.com/2010/12/10/nexus-s-review/.
Their exact quote: "One other thing of note -- we noticed a few missed or latent presses on the touchscreen which occasionally led to stuttery behavior or an opened item that we didn't mean to tap. It's hard to say if this was a software or hardware issue (and we know that sometimes Android devices can be particularly finicky when syncing). It wasn't a deal-breaker by any means, but we saw the issue rear its head a handful of times, and felt it was worth mentioning."

it's nothing ,, the Samsung galaxy S does that too D:

that happens due to the static on your finger.

Hi
I opened a thread (http://forum.xda-developers.com/showthread.php?t=879872) because I definitely have a problem on the back capacitive button, just wondering how many people are affected?
In fact I have seen this in four devices now, it looks that there is a batch of defective Nexus S phones out there affected by this problem?

It's normal. My Nexus One is like that too. It's magic.

So, it is normal to have un-responsive back button after some times?
Damn ... this is bad. I hope I can cope with it. I really hate hardware problem.
And still could not understand why Google cannot fix it.
Last time from HTC ...
And now from Samsung ...
*Still waiting Nexus S from UK*
nxt said:
It's normal. My Nexus One is like that too. It's magic.
Click to expand...
Click to collapse

gogol said:
So, it is normal to have un-responsive back button after some times?
Damn ... this is bad. I hope I can cope with it. I really hate hardware problem.
And still could not understand why Google cannot fix it.
Last time from HTC ...
And now from Samsung ...
*Still waiting Nexus S from UK*
Click to expand...
Click to collapse
There's a thread for the back button, that's a real issue. Some people have the Back button issue, some the Home button issue. Both of those buttons are on the outer edge of the phone, so something may be messed up when the phone was being assembled.

xperia x10 freezes, hangs upon pressure or bending, also USB connection problem

Hello all,
My X10 has a few strange problems regarding freezes and reboots, and also problems with USB connections.
When my I applie pressure to my phone, it reboots. This also happens when I slightly bend my phone. It's a strange problem and I think (almost know for sure) it's hardware related because it happens in two custom roms (freexperia beta 4 by Zdzihu, and Achotjan_Froyo_2.2.1) and also in xrecovery.
The other problem I have has to do with my USB connection.
When i connect my phone to my pc. there is no notification and it doesn't connect to my PC. in contrast to other x10's that have USB connection problems (I've searched other threads) charging is still completely normal.
That's why I think the USB connection is software related
I was wondering if somebody has something usefull to say about either one of the issues, thats why I'm posting.
So if anyone has any idea feel free to post

...Life sucks?.... new phone maybe?
Sent from my X10 using XDA Premium App

Don't bend it?

It sounds like a bad or lose connection some where on the motherboard. Has your phone had any hard impacts?
Sent from my X10 TripNMiUI-IRIS using XDA Premium App

How are you bending the phone?
http://www.engadget.com/2011/05/04/flexible-paperphone-wants-to-get-bent-out-of-shape-video/

kxhawkins said:
Don't bend it?
Click to expand...
Click to collapse
andrewddickey said:
How are you bending the phone?
Click to expand...
Click to collapse
I'm not really bending my phone but "trying to bend it"or pressure lets it reboot. this would indeed be not really much of a problem, just don't bend or apply pressure. The problem however is that when I put it in my pocket, the same kind of forces (bending, pressure) will work on it and it'll reboot. this is pretty annoying because each time you'll get your phone out of your pocket it's rebooted or it still hangs.
zax10 said:
It sounds like a bad or lose connection some where on the motherboard. Has your phone had any hard impacts?
Click to expand...
Click to collapse
Well yes it has, a car drove over it once but that's was more then a year ago, and it's fallen quite hard sometimes. I've opened it up however, and nothing is visible wrong (loose connections etc.)

Joren90 said:
Well yes it has, a car drove over it once but that's was more then a year ago, and it's fallen quite hard sometimes. I've opened it up however, and nothing is visible wrong (loose connections etc.)
Click to expand...
Click to collapse
Seriously???
A car drove over it and it has fallen quite hard sometimes?!
That makes the title of your thread misleading.
You should have mentioned these in the OP.
It's a miracle the phone works!!!
Of course something might be messed up inside
and probably not in a visible to the naked eye way.
If you want to hold on to the phone, maybe buy a hard case,
that will keep the pressure to minimum while in your pocket!

Probably a loose capacitor or resistor...

I'll agree with My_Immortal on that one. A hard case might help you in you situtation. But mate let me say this. From the injuries that your x10 has been through it's a miracle it still works!
Imho you should take better care of your stuff , it's a smartphone for God's shake not a buldozer!

Joren90 said:
I'm not really bending my phone but "trying to bend it"or pressure lets it reboot. this would indeed be not really much of a problem, just don't bend or apply pressure. The problem however is that when I put it in my pocket, the same kind of forces (bending, pressure) will work on it and it'll reboot. this is pretty annoying because each time you'll get your phone out of your pocket it's rebooted or it still hangs.
Well yes it has, a car drove over it once but that's was more then a year ago, and it's fallen quite hard sometimes. I've opened it up however, and nothing is visible wrong (loose connections etc.)
Click to expand...
Click to collapse
Words cannot describe how special you are.
Were you holding the phone when the car went over?

Joren90 said:
Well yes it has, a car drove over it once but that's was more then a year ago, and it's fallen quite hard sometimes. I've opened it up however, and nothing is visible wrong (loose connections etc.)
Click to expand...
Click to collapse
LMAOOOOOO, funniest thread ever ;D
Sent from my X10 using XDA Premium App

My_Immortal said:
Seriously???
A car drove over it and it has fallen quite hard sometimes?!
That makes the title of your thread misleading.
You should have mentioned these in the OP.
It's a miracle the phone works!!!
Of course something might be messed up inside
and probably not in a visible to the naked eye way.
If you want to hold on to the phone, maybe buy a hard case,
that will keep the pressure to minimum while in your pocket!
Click to expand...
Click to collapse
Well yes indeed I could've said this.
But why I haven't is because it happened more than a year before these problems started. the bending, pressure problem started quite suddenly out of nowhere, and thus might not be related
(I also think the car didn't do that much damage, my phone lay flat on the road, and the car drove pretty fast (around 50 kph) so the car was actually on the phone for a very short time: less than 9 micro seconds .)
I've started this thread mainly because I thought maybe someone had heard about these kind of problems before and knew something about it.

Joren90 said:
Well yes indeed I could've said this.
But why I haven't is because it happened more than a year before these problems started. the bending, pressure problem started quite suddenly out of nowhere, and thus might not be related
(I also think the car didn't do that much damage, my phone lay flat on the road, and the car drove pretty fast (around 50 kph) so the car was actually on the phone for a very short time: less than 9 micro seconds .)
I've started this thread mainly because I thought maybe someone had heard about these kind of problems before and knew something about it.
Click to expand...
Click to collapse
I understand that the car incident was a year ago,
but in my opinion, it's very hard NOT to relate it with your issues.
Of course, there is always the possibility that it has nothing to do with them,
Have you tried using a hard case?

My_Immortal said:
I understand that the car incident was a year ago,
but in my opinion, it's very hard NOT to relate it with your issues.
Of course, there is always the possibility that it has nothing to do with them,
Have you tried using a hard case?
Click to expand...
Click to collapse
should open it and test across the components to see where the drop in voltage occurs, probably a simple resoldering would do the trick!!

fiscidtox said:
should open it and test across the components to see where the drop in voltage occurs, probably a simple resoldering would do the trick!!
Click to expand...
Click to collapse
Yeah.. it may just be a simple loose component.
Only solder if.
1. You know what your doing.
2. You have steady hands.
3. you have the right soldering iron "i use a 25W to 80W fine tip"

OmegaRED^ said:
Yeah.. it may just be a simple loose component.
Only solder if.
1. You know what your doing.
2. You have steady hands.
3. you have the right soldering iron "i use a 25W to 80W fine tip"
Click to expand...
Click to collapse
May I add:
0. You are sober.

Desire HD multitouch

Did anyone here notice problems with multi-touch when pressing with 4 fingers in a square.
It fails to recognize all fingers or misplaces them or other strange behaviour.
That means the screen is not REAL multi-touch and that's kinda disappointing in my opinion.
(4 fingers work fine in most situations, only when trying to achieve a perfectly aligned square)
Can anyone else try this? (best program to use is "Multitouch visible test" free from market.)

Works for me.
Sent from my Motorola Startac running Atari 2600 software!

if there are 2 fingers on same row, one of them disapere.. if you do a perfect square, you get left with one finger working...

DubelBoom said:
if there are 2 fingers on same row, one of them disapere.. if you do a perfect square, you get left with one finger working...
Click to expand...
Click to collapse
As I said, strange stuff happens with 4 fingers aligned like that

Foladko said:
As I said, strange stuff happens with 4 fingers aligned like that
Click to expand...
Click to collapse
very wired.... but how cares, i can play fruit ninja with 4 fingers

I am having no problems at all...
Sent from my Desire HD using XDA Premium App

Works for me....
And yes, it is "real" multitouch

Fine here too.

All good with mine also - four points in a square with no problems whatsoever.

works fine with me too

I've been testing this further today and it's slightly more complicated.
I noticed that when plugged into charger it seems to work, but as soon as I disconnect it the issue is back.
It also worked or didn't randomly through the day.
So I guess this could be a software issue, possibly to conserve battery..?

Foladko said:
I've been testing this further today and it's slightly more complicated.
I noticed that when plugged into charger it seems to work, but as soon as I disconnect it the issue is back.
It also worked or didn't randomly through the day.
So I guess this could be a software issue, possibly to conserve battery..?
Click to expand...
Click to collapse
I noticed this too! At first, I was happy that it worked for me, but then I read this, and plugged it out of the charger. So then we know that when we want to impress our friends with four points multitouch, we need to have the charger plugged in

Foladko said:
I've been testing this further today and it's slightly more complicated.
I noticed that when plugged into charger it seems to work, but as soon as I disconnect it the issue is back.
It also worked or didn't randomly through the day.
So I guess this could be a software issue, possibly to conserve battery..?
Click to expand...
Click to collapse
I can confirm that. Just tried it and it behaves very strange. Seems to me that it's not related to charging because both times I had my phone off the charger...
EDIT: OK I rebooted just to see if it's software related. It's not. It's purely hardware. You have to hold your phone to get proper multitouch. Simple as that.
Sent from my Desire HD using XDA App

DubelBoom said:
if there are 2 fingers on same row, one of them disapere.. if you do a perfect square, you get left with one finger working...
Click to expand...
Click to collapse
You might have a faulty device if it doesn't work...
Sent from my Desire HD using XDA Premium App

Please remember that there are 4 different models of touch panel that HTC use in the Desire HD, 2 different screen models and 2 different camera modules. Not all DHDs are the same. If you have an ENG HBoot then you can see what hardware your DHD has by checking 'system info'.

Doktaphex said:
Please remember that there are 4 different models of touch panel that HTC use in the Desire HD, 2 different screen models and 2 different camera modules. Not all DHDs are the same. If you have an ENG HBoot then you can see what hardware your DHD has by checking 'system info'.
Click to expand...
Click to collapse
Well I know about 2 different screens, and the Inspire 4G uses a slightly better camera, but I've never heard about 4 different touch panels being used
I also don't think it's a hardware issue, because then it wouldn't just work and then stop randomly. It really sounds like a software thing TBH
My phone has the auo screen and the touch pannel is: SYN3KT_0108

Foladko said:
Well I know about 2 different screens, and the Inspire 4G uses a slightly better camera, but I've never heard about 4 different touch panels being used
I also don't think it's a hardware issue, because then it wouldn't just work and then stop randomly. It really sounds like a software thing TBH
My phone has the auo screen and the touch pannel is: SYN3KT_0108
Click to expand...
Click to collapse
Hold the phone while testing the touchscreen. if you just leave it on the table, it behaves like you describe. If you hold it in your hand, the touches are precise.

Foladko said:
Did anyone here notice problems with multi-touch when pressing with 4 fingers in a square.
It fails to recognize all fingers or misplaces them or other strange behaviour.
That means the screen is not REAL multi-touch and that's kinda disappointing in my opinion.
(4 fingers work fine in most situations, only when trying to achieve a perfectly aligned square)
Can anyone else try this? (best program to use is "Multitouch visible test" free from market.)
Click to expand...
Click to collapse
If you get "Z-DeviceTest" app you can test almost everything... and our Display can recognize a maximum of 4 fingers, not more and not less, so its multitouch => Jazzhand XD^^

As others pointed out you need to hold the phone in your hand so your hand acts like a ground. And thats actually not really a problem since capacitive technology is supposed to be grounded if you want to make precise touch. Thats just basic electronic stuff we all should know
Sent from my Desire HD using XDA App

Nece228 said:
As others pointed out you need to hold the phone in your hand so your hand acts like a ground. And thats actually not really a problem since capacitive technology is supposed to be grounded if you want to make precise touch. Thats just basic electronic stuff we all should know
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
I have thought of that and I know how capacitive touch tech works.
That does make sense.
But then 4 touch shouldn't work at all when not plugged in or being held, instead only square position not working when not in contact, I mean 4 fingers is the same deal whatever way you position them on the screen?
Care to explain further?

[Q] Possible Touchscreen/Multi-Touch issue?

Multitouch Visible Test
With that app, 1-finger touch is alright, no issues.2 Fingers seems alright too. Adding up to 4 fingers seems to be alright and moving them around the screen.
Sometimes with 5 fingers though, they'll all show on the program, and then immediately vanish. If I keep moving my fingers across the screen, they'll pop in and out, but won't actually stay on screen and follow. But this only happens sometimes. Other times, 5-finger input works fine.
My other camera is dead at the moment and I have to run and get batteries for it tomorrow, so I can't actually upload video of what I mean. I was hoping to get some input from other people about how their multi-touch seems to be with that app. Not entirely sure if this is just a rare defect, widespread, or working as intended maybe (not entirely sure if there's anything saying how much multi-touch this screen is; figured it was 10 though)
Some things to try:
- Use 1 finger, drag it all over the screen
- Keep adding fingers 1 by one after dragging them across the screen (add finger, drag it around, add next finger, etc.)
- Don't touch the screen for about 3 seconds, then just have all 5 fingers come in-contact with the screen, and keep them in one spot (on mine most of the time, the points appear then immediately vanish)

Could it just be the app your using?
Try using this one...
Check out "MultiTouch Tester"
https://play.google.com/store/apps/details?id=com.the511plus.MultiTouchTester
See if it does the same thing.
Sent from my SPH-L710 using xda app-developers app

jjdevega said:
Could it just be the app your using?
Try using this one...
Check out "MultiTouch Tester"
https://play.google.com/store/apps/details?id=com.the511plus.MultiTouchTester
See if it does the same thing.
Click to expand...
Click to collapse
Yea it still does the same thing :/ Here's a video:

It could be as simple as compatibility issues with the app...
Sent from my SPH-L710 using xda app-developers app

Called up Google and it doesn't seem to be widespread (or at least the person didn't say it was), and I could get a replacement under warranty. I don't have the funds to put on hold currently so it'll have to wait if I do decide to do it.
Although I wonder if I really should, I mean I highly doubt I'm going to do anything requiring more then 2 fingers on the screen at any point (nor can I really think of anything), and aside from multitouch, everything else seems great. No dead pixels, back doesn't flex, screen is alright quality-wise.
Would be nice if some other people can try out multitouch though just to see if it really might be widespread or not though. The thing is though, it works fine sometimes, and other times it doesn't. Perhaps software might fix it in time, but I don't know. I thought I heard of the Nexus 7 having a similar issue, but I can't recall...
jjdevega said:
It could be as simple as compatibility issues with the app...
Click to expand...
Click to collapse
It seems to do the same even with the "Show touches" option enabled in Developer options (tried it on an empty homescreen).

Bump

Anyone? It only takes a minute or two at the most to test this... and the apps available to do so are free and light.

Doing the tests you described never caused anything on my tablet. But if I put my hand down on the tablet flat then put my five fingers on I get your issue. Then wait three seconds and try again and everything is fine till I put my palm back on.

Might be a badly configured palm detection algorithme? Op, do you have fat fingers? Sorry if that sounds rude

Chluz said:
Might be a badly configured palm detection algorithme? Op, do you have fat fingers? Sorry if that sounds rude
Click to expand...
Click to collapse
Lol, hmm, na I don't think I have fat fingers

How about fruit ninja, does that work properly? It's true that if show touches doesn't work, it's not a good sign. Unless it's a system firmware bug

1 and 2 fingers seems to work great in Fruit Ninja; 3+ randomly works or doesn't work, and when it does work it seems to cut-out at some point and then just show slashes delayed from where my finger is currently

Any idea if its hardware or software related? I have the same issue with my N10 and don't know if I should get a replacement or not.

Got mine today, same issue. Actually, that too bad since everything works fine, and i only got a minimal light bleed. I hope my replacement won't be worst regarding light bleed :/

Same issue on mine. Considering a replacement now with this and wakeup lag + battery issue (indicator not updating % at all!?)
Don't know if I wasn't lucky or just poor QA.

I'm pretty sure it is a software thing because when the problem occurs and I tab on the multitasking button twice (so it shows the multitasking menu and switches back to the app) the touchscreen acts normal again until I put more than three fingers on screen.
But if its a software problem, shouldn't it happen to on every N10 running the same Android version?

I have the same issue. If I slowly add one touch at a time, it usually works. But if I touch down 3+ fingers at once it gets very confused and bounces between zero and N touches. I have a Galaxy Tab 10.1 (first generation) and multitouch seems to work much better on it than the Nexus10. However, I did notice that the Nexus10 is better at distinguishing 2 very close touches than the GTab. On the Nexus10 I can have my fingers as close as 1/2 inch or so before the touches merge. On the GTab it is more like 3/4".

Hmm, kind of interesting to see that others are also having a similar issue.
I noticed that when I tried a custom ROM (latest Kernel sources + 4.2.1), the multitouch seemed to work, slightly better (the issue still occurs, just maybe not as much). Not too sure if it was placebo or what though.

I called the support and will replace mine with a new one. It might be just a software issue thats solved with an update but I don't want to risk it.

just got my replacement today, same issue (and also worst light bleed ). Third replacement on this way...