I have also been experiencing this but installing the ppa:sevenmachines/flash has fixed it for me.
flashplugin64-installer Version: 10.3.162.29-0ubuntu0~sevenmachines2 with firefox 5.0+build1+nobinonly-0ubuntu0.10.10.1~mfs1 on Ubuntu 10.10 x86_64 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/761074 Title: flashplugin-nonfree draws white rectangles To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/flashplugin-nonfree/+bug/761074/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
