I watch videos on youtube a fair bit, usually only fairly short ones (interviews, music vids, movie trailers etc). Since ysterday though, when i try to switch a video to full screen it f*** everything up - i get audio but no video. If i watch the youtube video embedded (ie normal size) this doesn't happen, it just plays as normal, but it's pissing me off not being able to watch them full screen. I've never had this problem in the past and have no idea what could be causing it. I've tried making sure there are no other programs running at the same time, restarting firefox, none of which seems to make any difference. Please help.
