[Isomorphic]

No, we tried with both FF4 and FF3.6 with similar results.

[Rdamario]

Isomorphic, we are able to reproduce this using Chrome 11, Safari 5.05 and Firefox 4 on various computers including MacOSX, XP and Windows 7.

We simply go to www.smartclient.com/#massUpdate and start alternating between 4 and down arrow. After a few rows the cell no longer changes and the keystrokes begin to merge.

If I go to firefix 3.6.17 then everything works ok.

Can we take this offline so that I can explain it better.

[Isomorphic]

Not sure what to tell you - for a sanity check we just tried it again in FF4 and Chrome 11 - no issues. And we have zero similar reports from any other users.

We're not sure what you have in mind by taking this "offline" but perhaps a Jing video would make it clear if the key pattern you're using is not simply the fast alternation of keys we're trying based on your description.

However we suspect that we are using the same key input pattern and you really need to start thinking about hardware differences. For example, some keyboards will not respond if there are too many keys down, or KVM switches can introduce latency and other problems.

[Rdamario]

I've tried 5 different PC. If I load 3.6.17 on and old AMD2400 it works fine. If I load 3.6.17 on and Intel i7 quad core it works fine. If uninstall and install FF4 on the i7 it falters.

I have captured video but the upload size is 8megs so I can't attach it.


On the same hardware if I run FF3.6 it works and then run FF4 it doesn't. I don't believe hardware has anything to do with it.

[Isomorphic]

You can email the video to support@isomorphic.com or provide a link to download it.

[jay.l.fisher]

I'm able to easily recreate the problem using the massUpdate sample with Firefox 4.0.1 but not with Firefox 3.6.17. Both are running on the same hardware, a MacBook Pro, 3.06 GHz Intel Core 2 Duo, 8GB 1067 MHz DDR3.

[Isomorphic]

rdamario, there are subtle visual flaws in your video which suggest the presence of a browser extension or something else interfering with the normal behavior of Firefox 4.

We have previously traced apparent SmartClient / SmartGWT issues to browser extensions that should have no effect on rendering or interactivity, but do.

If you have any extensions at all, even if you feel sure they could not possibly interfere and have never interfered with any other site and do not interfere with earlier versions of Firefox, please disable them and retest.

[Rdamario]

Hi Isomorphic, I just did a clean install of XP and new install of FF4. I check the plugins and extensions and there are none. I then went to massupdate and the issue persists with FF4. The visual flaws in the video is due to compression of the video.

[Isomorphic]

Just tried out a clean FF4 installation in a clean WinXP install in a VM (which should exacerbate any performance problem), still cannot get this to happen.

Can you clarify, you are pressing and releasing a single key (say "4") and the down arrow key in alternation, very fast. You are not holding down either key. Correct?

[Rdamario]

Hi, yes I am alternating between 4 and down arrow fast(about 6-7 keystrokes per sec). I can get it to reproduce on any computer I try and I've tried about 13 different computers. Maybe we could get a webex going so that you can see. I could also setup a computer which has access to the internet and have you connect into that and try via RDP.

[Isomorphic]

Eureka! The problem is you guys are sloppy with your keystrokes :)

This is easily reproduced if you hold down down arrow, press another key while down arrow is still down, then release both.

It will not happen no matter how fast you type and seemingly no matter how slow the machine is so long as your keystrokes do not overlap in this way.

We should be able to solve this quickly now.

[Rdamario]

Isomorphic, I will try your fix when it is out. That was not the key combination that we were doing, We were clearly alternating keys, fully releasing before pressing the next. If your fix resolves our issue then that would be great.

Thanks.

[Isomorphic]

It's probably not the key combination you intended, but it can happen if you are trying to alternate keys very fast. It is also the only plausible explanation for your ability to reproduce it on many machines and our inability to reproduce it on a similar number of machines using strict alternation of keys. But you'll be able to retest of course once the fix is in.

[Rdamario]

Thanks Isomorphic. Let me know when I can take the nightly build.

[Isomorphic]

Ok this should now be resolved. Please try the next nightly build, dated May 10 or greater

Regards
Isomorphic Software