I can confirm this behavior and the initial black behind the Dash is due to the fact that OpenGL 1.4 is being forced as the workaround for the poor performance for Mesa 9.2. Why it takes changing the background to get the correct blurring still needs to be investigated.
** Changed in: unity (Ubuntu) Status: New => Triaged ** Changed in: unity (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1232726 Title: Dash bg color doesn't match its surroundings To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1232726/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs