Leaving nothing but the following lines in /etc/adobe/mms.cfg solved it for me.
EnableLinuxHWVideoDecode=0 OverrideGPUValidation=true http://ubuntuforums.org/showthread.php?t=1985689 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1075274 Title: Flash Plugin crashes in YouTube Fullscreen mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/adobe-flashplugin/+bug/1075274/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs