542342 - Display issue with transparent Flash overlay

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[Shawn]

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6
Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6

On OSX, areas of the page that are overlapped by, or, underneath a transparent Flash layer will have their pixel position jogged slightly to the right.  Looks kind of like a blitting error.

Reproducible: Always

Steps to Reproduce:
1. Visit a site with a flash app that overlays or is overlayed by regular HTML content
2. Look along the edges of the flash app, HTML content, text, images, will be misaligned by one pixel, resulting in an effecting that looks like a screen blitting error.
3.
Actual Results:  
The page looked to be rendered improperly.

Expected Results:  
It should not have caused the overlayed pixels to be misaligned relative to the rest of the page.

Comment 1

[Jay Klehr]

This happens to me as well, I've provided a screenshot of it.

http://i48.tinypic.com/15s1mi1.png

(Where the shift in the calendar widget happens is where the html calendar crosses the border of the flash movie below it)

Mac OSX 10.5.8
Firefox 3.6
Flash Player 10.0.42

It didn't happen in Firefox 3.5, and doesn't happen in Chrome or Safari on the same computer.

Comment 2

[Jay Klehr]

Tested this in Firefox 3.6 on Windows 7 and there are no rendering issues.  Appears to only affect the mac version, and only 3.6.

Comment 3

[andrew.morfee]

Same happens for me in Firefox 3.6 on OS X 10.4.11

Screenshot: http://img683.imageshack.us/img683/418/flashbug.jpg

The effect will be persistent with scrolling down a page, i.e you will see the misalignment move through the overlay.

Didn't happen in 3.5.7 only since upgrading to 3.6

Comment 4

[jerry]

Jerry Keller writes:
on Met Opera metplayer site:http://www.metoperafamily.org/met_player/    flash is used for subtitle and all motion control of playback. No subtitles and motion control bar does not show when mouse is dragged to bottom of screen 
This site works well when using safari on mac OS 6xxx but mac must be set so that safari opens in 32 bit mode.
The above has not worked on ANY version of Firefox.
jerry

Comment 5

[Tyler Downer [He/Him]]

Reporter, are you still seeing this issue with Firefox 3.6.13 or later in safe mode? If not, please close. These links can help you in your testing.
http://support.mozilla.com/kb/Safe+Mode
http://support.mozilla.com/kb/Managing+profiles

You can also try to reproduce in Firefox 4 Beta 8 or later, there are many improvements in the new version, http://www.mozilla.com/en-US/firefox/all-beta.html

Comment 6

[Jay Klehr]

Still happens for me in Firefox 3.6.13 in safe mode.  Unable to test with Firefox 4 at the moment, but will try to soon.

Comment 7

[Shannon]

Screenshot from 3.6.13
http://shanimal.com/skitch/Firefox-20110115-154154.jpg

Comment 8

[Tyler Downer [He/Him]]

No reply, INCOMPLETE. Please retest with Firefox 3.6.13 or later and a new profile (http://support.mozilla.com/kb/Managing+profiles). If you continue to see this issue with the newest firefox and a new profile, then please comment on this bug.

Comment 9

[Shannon]

Hey Tyler,

Sorry I'm not sure what you're asking for. The screenshot I added is from 3.6.13. It pretty clearly shows the problem.

Let me know what you need. I'll provide a test case if you need one.

-Shannon