Ubuntu 9.1, I just intalled the latest what i guess is an upgrade for the beta release of 9.1 and i am now unable to open any folders. The internet and everything words but I am unable to open say "home" folder or "picutures". i also can not open an external hardrive. A starting up box will appear in the bottom task bar and then just dissappear. Is there a way to uninstall this update and go back to ubuntu 9.04? thank you for your time.