733337 - Picture being rendered outside intended region

Status: RESOLVED FIXED

(Core :: Layout, defect)

Description

[Fanolian]

Attachment: Screenshot of the issue

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20120305 Firefox/13.0a1
Build ID: 20120305031045

Steps to reproduce:

It is originally posted at http://forums.mozillazine.org/viewtopic.php?f=23&t=2439215.

Test link:
http://forum.moztw.org/posting.php?mode=reply&f=2&t=34752
It is a local firefox community forum in Chinese using phpBB.

At the bottom there is a preview pane of previous replies. If I scroll up and down inside the preview pane, sometimes the pictures in it are rendered outside the pane overlapping other contents. It returns to normal position after a second or so.

Last good nightly: 2012-02-16
First bad nightly: 2012-02-17
Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=a853f4017192&tochange=2271cb92cc05

The issue is not reproducible if hardware acceleration is disabled.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Timothy, any idea what could be the problem here?

Comment 2

[Timothy Nikkel (:tnikkel)]

I can see it on Mac too. Based on that I'm suspecting bug 727661.

Comment 3

[Timothy Nikkel (:tnikkel)]

Confirmed that bug 727661 is the cause.

Comment 4

[Timothy Nikkel (:tnikkel)]

Might be fixed by bug 735141.

Comment 5

[Lukas Blakk [:lsblakk] use ?needinfo]

[Triage Comment]
Adding qawanted to confirm that bug 735141 possibly fixed - STR in comment 0

Comment 6

[u279076]

(In reply to Lukas Blakk [:lsblakk] from comment #5)
> [Triage Comment]
> Adding qawanted to confirm that bug 735141 possibly fixed - STR in comment 0

Apparently this landed in Aurora on March 21st. I tested Firefox 13.0a2 Aurora 2012-03-20 and cannot reproduce this bug. Therefore, I cannot claim bug 735141 fixed this bug. Seems as though it could have been fixed beforehand.

Comment 7

[Timothy Nikkel (:tnikkel)]

Let's call this fixed. If not please reopen.