This is driving me nuts. About half the time I go to view a YouTube video, or see one embedded in a forum, all I see is a scrambled image and it doesn't work. A total restart of Firefox WILL fix it most of the time, but this shouldn't be happening. I've tried disabling all plug-ins, turning off Adblock Plus, etc, but nothing helps. I keep having this periodic, but frequent problem. This has been happening since I got my brand-new Macbook Pro in August this year, which came pre-loaded with Lion. I'm currently using Firefox 8.0.1 and latest updated on OSX 10.7.2. However, this has been happening for the last several versions of Firefox. Here are screenshots of what it looks like when this happens. ANY CLUES?