275484 - part of window gets held over in a new tab

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[HJ]

There's something screwy about the front page of http://www.guitaretab.com/ that
causes odd behavior when more than one tab is open. To reproduce:

1. Launch FF 1.0 and point it at the URL above.
2. Open a second tab and point it to some other site, e.g. http://www.mozilla.org/
3. Switch to the first tab.

What I see (as of 11pm EST 20Dec2004):

Upper left-hand corner of www.guitaretab.com retains whatever was in that part
of the FF window in the second tab.

Expected behavior:

Not sure what was supposed to be there, but it certainly shouldn't be stale
content from another tab.

For what it's worth, this problem also exists in Mozilla 1.7.5 (checked just
now). Please advise if this needs to be filed separately for Moz.

Can someone verify if this also occurs with Win or Linux? I only have access to
a Mac at the moment.

Comment 1

[Jesse Weinstein]

WORKSFORME with Firefox 0.10.1.  Please try it with Javascript off and on,
Cookies, anything else you can think of.

Comment 2

[HJ]

Attachment: PDF screenshot of the rendering glitch

Comment 3

[HJ]

Weird. The site looks OK now, but the Google cache as of right now (7:00pm EST
20041223) still illustrates the problem I saw yesterday:

http://66.102.7.104/search?q=cache:5ivZCBCu1dgJ:www.guitaretab.com/+&hl=en

It does indeed appear to be Javascript-related. Turning off JS and doing a
page-back followed by a page-forward makes it (the Google cache page, that is)
render normally. Turning JS back on and doing the same reproduces the glitch.

The above attachment is a PDF screen capture illustrating the problem, in case
the Google cache changes.

Comment 4

[HJ]

Attachment: Screenshot of tabbed rendering glitch

Comment 5

[HJ]

Attachment: Screenshot of tabbed rendering glitch

Comment 6

[HJ]

This behavior has cropped up again -- sort of. I'm running <Mozilla/5.0
(Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7.6) Gecko/20050225
Firefox/1.0.1>. I also have the User Agent Switcher extension installed 
(http://www.chrispederick.com/work/firefox/useragentswitcher/).

The page I just found that exhibits the problem is
<http://www.sonicare.com/contact_us/default.asp>. The mitigating factor is that
it only seems to happen when the User Agent is set to "Internet Explorer 6
(Windows XP)". To reproduce:

1. Open a new FF window and browse to the URL above.
2. Open a second tab and browse to some site. This also works with internal
pages (for example, the about:mozilla "religious" quote).
3. Switch back to the first tab.

What should happen:
Clean rendering as we switch back and forth.

What does happen:
A chunk of the contents of the second tab remains in the window when we switch
back to the first tab.

Further comments:
In my earlier report, I found that turning off Javascript made this go away.
Same thing happens here, but with JS switched off, the "problem" website reverts
to plain-text rendering, so it's not really a meaningful comparison.

For what it's worth, none of the other User Agents available by default (true
FF, NS 4.8, and Opera 7.54) exhibit this problem -- just the IE-on-XP one.

Since my earlier report had nothing to do with the User Agent Switcher
extension, it seems possible that this is still a rendering quirk in FF, albeit
subject to the specific circumstances described above. Definitely not critical,
but may be worth looking into.

Screen shot (using about:mozilla thing in the second tab) attached above, in
case anyone has trouble reproducing.

Comment 7

[HJ]

Oops -- accidentally posted attachment twice. Marked one copy as obsolete.
Anyone with admin rights, please feel free to delete. Sorry about that. -H

Comment 8

[HJ]

This may be a dupe of bug 162134, but this seemed to be related to Javascript,
whereas that one had to do with Java. I'm not much of a coder, so it would be
great if someone who understands the guts of that bug could verify this.

Comment 9

[Samuel Sidler (old account; do not CC)]

Does this still happen with FF 1.5?

Comment 10

[Samuel Sidler (old account; do not CC)]

I don't see this at all using Firefox 2.0.0.3. If you can reproduce with that version of Firefox (or a later one), please file a new bug detailing what sites cause it and how to reproduce. Be sure and test with a new profile.

http://kb.mozillazine.org/Profile_Manager