I have the exact same problem. This only happens after you enable middle-clck autoscrolling in Firefox (disabled by default in Ubuntu).
Here's how I enabled middle click scrolling: https://bugs.launchpad.net/ubuntu/+source/firefox-3.0/+bug/111339/comments/1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/768951 Title: Autoscrolling using middle click in firefox brings out unity launcher To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/768951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs