Anyone else encountered problems with the 10.1 updated CD? At my work we've upgraded 2 G4 Powerbooks from 10.0.4 to 10.1 and both encountered serious disk errors within a week. Typical behaviour includes Classic refusing to quit, the system loggin out when instructed to shut down, Classic suddenly and inexplicably crashing, the Finder freezing, the force quit window displaying the wrong classic apps running and the hard drive becoming so corrupt that no even Norton Utilities 6 in OS 9 can fix it. The idea that OSX is rock-solid stable seems like a poor joke - 10.1 is a lot faster than 10.0, but it seems stability has been sacrificed in the upgrade. Has anyone else encounted these problems, and does anyone else have any advice?