601784 - White flashing line when switching between categories in Preferences Pane

Status: RESOLVED DUPLICATE of bug 596955

(Firefox :: Settings UI, defect)

Description

[Marcia Knous [:marcia]]

Seen while running  Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b7pre) Gecko/20101004 Firefox/4.0b7pre

STR:
1. Load Minefield | Preferences
2. Switch between the various categories
3. Observe white flashing in screenshot

http://www.screencast.com/users/mozillamarcia/folders/Jing/media/09a6de0c-e2c7-4b8e-8c2c-60aaf15d4989

Does not happen using  Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b6) Gecko/20100101 Firefox/4.0b6 so this is a regression

Comment 1

[Marcia Knous [:marcia]]

I checked another lab machine running 10.6 and the same thing happens on that machine. This behavior does not occur on my 10.5 laptop.

Comment 2

[Marcia Knous [:marcia]]

Seems as if it is most noticeable when switching between the Privacy and Security Tab.

Comment 3

[Marcia Knous [:marcia]]

If I turn off layers.accelerate-all in about:config the problem goes away.

Comment 4

[Mehdi Mulani [:mmm] (I don't check this)]

This bug seems to occur when switching between panes causes the window size to shrink vertically but not when expanding.

An easy STR is to switch from the General pane to the Tabs pane.

Comment 5

[Johnathan Nightingale [:johnath]]

I see the flicker, too - this doesn't feel likely to actually be a preferences bug. I think something on the xul layer, or more likely in layout, is the culprit. Roc, thoughts?

Comment 7

[Dietrich Ayala (:dietrich)]

Canceling blocking, is a dupe of a blocker.