Same issue for me. There is a 'block' in the left/under corner. And Alt , Tab had a issue. As shown in the pictures below:
http://ubuntuone.com/4UmrC0vN6SNkICdQaJhKpR http://ubuntuone.com/0LOAR4NWN5XTwJl5ydRU2W -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1100970 Title: [gen3] Dash background flickers and blur is misplaced on intel graphics To manage notifications about this bug go to: https://bugs.launchpad.net/nux/+bug/1100970/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs