621926 - Titlebar flashes when mouse crosses a link or when typing

Status: RESOLVED DUPLICATE of bug 621762

(Firefox :: General, defect)

Description

[Michael]

User-Agent:       Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b9pre) Gecko/20101229 Firefox/4.0b9pre
Build Identifier: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b9pre) Gecko/20101229 Firefox/4.0b9pre

The title bar flashes multiple times per second when the mouse pointer crosses a link, and sometimes while typing.  The problem appears on multiple websites, but most frequently starts on http://www.facebook.com/home.php?sk=lf 

The flash includes a slight lightening of the title bar, plus a visible black bottom border on the title bar, above the tabs.  It looks like the title bar is getting redrawn when it should not be.  I believe this showed up a while back in an earlier minefield build, but couldn't find it as a previous bug report.

The problem seems to go away eventually, but then comes back if I visit http://www.facebook.com/home.php?sk=lf, or on certain other pages (such as this bug report page).  The problem does not show up every time.

Reproducible: Didn't try

Steps to Reproduce:
1.  Go to http://www.facebook.com/home.php?sk=lf
2.  Move mouse across links
3.  Title bar flashes, with a black border on the bottom.
Actual Results:  
Title bar flashes, with a black border on the bottom.

Expected Results:  
Title bar sits there quietly, contemplating its role in life, and wondering what it would be like to be an icon.

Comment 1

[Michael]

I should note that the computer on which I'm seeing this has the following graphics configuration:

ATI Radeon X1600:

  Chipset Model:	ATY,RadeonX1600
  Type:	GPU
  Bus:	PCIe
  PCIe Lane Width:	x16
  VRAM (Total):	128 MB
  Vendor:	ATI (0x1002)
  Device ID:	0x71c5
  Revision ID:	0x0000
  EFI Driver Version:	01.00.068