I've had a few install rounds with ubuntu ever since 8.04 and has worked flawlessly every time. However, for some reason, when I try to click either System Settings or Software Center, the icon pulses as if it were working to come up but never does. The same goes for System Settings. I would expect that a password dialog would appear, but nothing shows. Is there bug with 11.10 that didn't exist with 11.04?