Indeed, this is a problem with a plugin, fullerscreen (this is one of my favourite plugins!). I've sent the author an email about this and hope it can be fixed soon.
** Changed in: firefox-3.0 (Ubuntu) Status: Incomplete => Invalid -- odd page rendering in full-screen https://bugs.launchpad.net/bugs/223370 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs