i was using latest firefox and found no error. but when i switched to flock to try connect to my facebook account (i'm using flock for facebook, regular firefox for email and browsing, opera for downloading things, lolifox for anime forums), it keeps bouncing back to facebook connect page. most likely it was because of the addon i'm using (request policy). i'll try to set it to temporary allow all request from glitch.com and give report next time.
If you're using Snow Leopard, you might want to try using a WebKit nightly build combined with the Flash beta, as Adobe made some changes which should make things work somewhat faster.