I'm not at home at the moment but I had a strange problem with the new beta at first, the startup movies weren't playing properly, I could hear them but it was just a black screen, this happened twice but after that it seemed to start working again.
Also my favourite theme retrotastic seems to have major issues with this new beta, long error messages were popping up in most of the views and the transition video (video static) when you scroll through the games wasn't displaying at all, it just showed some text which said something about out of player instances.
@Jason Carr @faeran
edit: ok..no idea what's going on now, all I did was update to the new beta and Retrotastic stopped working..but to be sure I downloaded a new copy of the theme and it's working fine....very puzzled.