I suppose the mouse/trackpad drivers have a properties settings available, have you looked in there for anything not kosher?
The drivers issue is the only bad thing about Linux, but there's quite a few linux sites out there that have a stockpile of drivers and workarounds that linux users have found.
When I go over to Linux I plan on having all the linux drivers downloaded and on a CD ready to install just in case they're not included in the GUI....