Oddly enough, I've got a similar setup: the dual optical Logitech mouse (corded, not cordless), XP Pro, and I'm using MS's IntelliPoint software instead of Logitech's mouseware. I've found that scrolling "response" and general functionality actually works better using the MS software, so you might want to give it a try. It works fine even though it's not an MS mouse... You might lose some Logitech-specific functions like that little Web app that pops up with forward, backwards, etc. "buttons," but I never used that anyway so it was no loss.
If you do try it, let me know how it goes for you.
m19
This comment was edited on Oct 7, 17:47.