Ubuntu

Comment 36 for bug 239182

I can reproduce this bug with Adobe Flash 10.

The 3 patches mentioned in the upstream bugreport definitely fix the issue (tested with patched xulrunner 1.9 and firefox 3.0):
http://hg.mozilla.org/index.cgi/mozilla-central/rev/9bbea3b66376
http://hg.mozilla.org/index.cgi/mozilla-central/rev/e30f2c0b5c1f
http://hg.mozilla.org/index.cgi/mozilla-central/rev/6c0971153949

So it's not a firefox but a xulrunner bug.