Comment 71 for bug 346289

@Bryce Harrington: please don't change the original report (unless you're the original reporter), and please don't attempt to "resolve" the issue in the title of the bug report.

There are multiple suggestions/workarounds/solutions in this thread, and the Adobe developer who has discussed this issue makes it clear that the modification you keep advertising (which we're probably all using by now) doesn't work with Compiz:

"Another important note: Compiz and GPU-accelerated Flash on Linux do not mix. The Flash Player still works if you have Compiz as your window manager; you just won’t be able to make use of GPU-accelerated features."

http://blogs.adobe.com/penguinswf/2008/05/flash_uses_the_gpu.html