I finally got a copy of 10.2 and used it to update a copy of 10.1.5 on one of my Beige G3s without a problem, except for when I ran the updates for 10.2.8 and other stuff (Safari, Stuffit, IE security update, and something else pretty minor) to get it up to speed. Once it finished updating to 10.2.8 it crashed hard when I rebooted none of my mice work.
I have traced the problem down to a copy of Kensington MouseWorks (2.4 IIRC) I use for a nice 4 button mouse. And I can't seem to uninstall it. Its supposed to be good up to 10.3 but versiontracker has a few mentions of it messing up 10.2.8
I don't have the mouse works install/uninstall application on the hard drive except in .sit form and stuffit was in the middle of updating so the stuffit engine is MIA.
So any ideas on how to fix this? I can drop back to classic, update my backups, then do a clean install of OS X but I'm not a fan of that option.