430558 - Download manager artifacts after resume with Cleartype enabled

Status: VERIFIED DUPLICATE of bug 439831

(Toolkit :: Downloads API, defect)

Description

[Jonathon Williams]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0.0.8
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0.0.8

After pausing and resuming a download on Windows with Cleartype enabled, the download manager does not repaint correctly and leaves a 1 pixel wide yellow line (the left edge of the first letter of the "Paused" text after the download is resumed and the estimated time is displayed).

The artifact goes away after selecting another download in the download manager and selecting the first download again.

Reproducible: Always

Steps to Reproduce:
1. Enable Cleartype font smoothing in Windows' display properties.
2. Start a download.
3. Pause the download using the Pause button in the download manager.
4. Resume the download using the Resume button in the download manager.
Actual Results:  
A 1px yellow line is left behind after the text changes from "Paused" to the estimated time.

Expected Results:  
No artifacts should be visible at any point in the process.

Comment 1

[Jonathon Williams]

Attachment: Image showing artifact in download manager

Comment 2

[-fullmetaljacket-]

i cant reproduce this on vista.

Comment 3

[Jonathon Williams]

Are you using the latest nightly?  I just noticed my build identifier and UA are incorrect above (thanks to me forgetting to turn off User Agent Switcher when posting this bug)...  should  be:

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9pre) Gecko/2008042305 Minefield/3.0pre ID:2008042305

Comment 4

[Brian]

Line appears for me (using "Windows Classic Style" and Windows XP) even without pausing and resuming. It appears anytime a download is started. Also not yellow, picture here http://forums.mozillazine.org/viewtopic.php?f=23&t=773445

Comment 6

[Stephen Donner [:stephend] Not actively reading bugmail]

Verified dup