Thank you for the update. There's no reason to downgrade to Ubuntu 8.10. Also, we do not support the 64 bit flash plugin at present. My guess would be your video drivers. Could you please post the output of: lshw -C video
That will allow us to see what video card you have so that we can further diagnose the problem. ** Changed in: firefox-3.5 (Ubuntu) Status: New => Incomplete -- youtube full screen choppy https://bugs.launchpad.net/bugs/415059 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs