595164 - Embedded flash objects don't scroll with rest of page

Status: RESOLVED DUPLICATE of bug 587508

(Core :: Graphics, defect)

Description

[Chris B.]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b5) Gecko/20100101 Firefox/4.0b5
Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b5) Gecko/20100101 Firefox/4.0b5

When viewing websites with embedded flash content, the page does not scroll properly.  The flash objects break up and some of the text underneath the flash content are not displayed when scrolling (missing lines).  This happens on many websites.

I have the latest Flash version installed (10.1.82.76) and these sites work just fine using Opera 10.61 and Safari 5.0.1 with the exact same plug-in (same version installed from Adobe for Safari, Opera, and Firefox).  So, for that reason, it is a Firefox issue and not an Adobe issue.  I am using Firefox 4 Beta 5 on Windows 7 Home Premium 64-Bit.

Reproducible: Always

Steps to Reproduce:
1. Make sure you have the latest Flash version installed for Opera, Safari, and Firefox (one download for all these browsers).
2. Go to any website with embedded Flash content inside the page (text and video).
3. A sample website with the problem described is:
http://www.geek.com/articles/games/duke-nukem-forever-back-in-development-as-gearbox-secures-ip-2010096/
Actual Results:  
The page should scroll smoothly with Flash content and text moving together without any breaking up.

Expected Results:  
The embedded Flash content do not scroll properly with the rest of the page, causing page rendering errors.

Comment 1

[(mostly gone) XtC4UaLL [:xtc4uall]]

If this does not happen when you disable the Hardware Acceleration Option in Tools/Options/Advanced/General (+ Restart of Fx), then this is properly just a Dupe of Bug 587508.

Comment 2

[Chris B.]

I just turned off Hardware Acceleration and the scrolling problem went away.  However, then I can't reap the benefits of having my NVIDIA chip draw the graphics on Firefox pages (I'm using a laptop).

Please explain to me the benefits / drawbacks of using Hardware Acceleration for me and other people viewing this Bugzilla report.

Comment 3

[Chris B.]

I just hope these Hardware Acceleration issues are fixed before Firefox 4 is officially released.  New features of the browser are nice and everything, but it doesn't help when it causes issues with rendering the web pages.