Mouse pointer works fine for most things, but with some games the pointer keeps jumping back to a spot about every second. It happens with 'Mouse', 'Track Stick', and 'Touch Pad'.
lbreakout2 - on the menu screen it works fine, but swith over to playing a game it gets jumpy
nexuiz - messes up right from the start
openarena - messes up right from the start, etc...
(These are just the ones that I tried this out with, there's probably more...)
Update: found this website:
"stop unclutter before launching a conflicting application."
So you can `killall unclutter` first. It's part of `kubuntu-full` so if you unintall `clutter`, it'll remove the `kubuntu-full` meta-package too, if that's installed. Maybe `unclutter` should be removed from the `kubuntu-full` meta-package grouping?