Firefox and Youtube videos were working after upgrading from 10.04 to 10.10 but a couple of weeks ago, my Youtube flash video player shows up as a grey box. The sound still works and I can hear the clip playing, but I can not see the video, or even the controls.
This is true for many of the flash based video players, and I think it even happens to some of the flash games out there on Firefox.
Everything works fine on Chromium. This isn't that weird because Chromium has its own flash plugin. However, some flash players still function properly on Firefox, like the full episode flash player on thedailyshow.com
Why would flash be grey box for some flash players but not all?
I have a 32bit system, and a ATI x300 GPU card, which has been giving me problems right after updating to 10.10, but that seems to be resolved now. I selected the allow proprietary codecs stuff at install , and then installed the Adobe Flash PPA and plugin in Ubuntu Tweak.