thanks for the warning. i have a logitech mx518 on a PC still on SP2.
MX518 here also.
The latest SetPoint 4.60.122 + XP-SP3 are working fine here, however I did find that uberOptions seemed to cause SetPoint to lockup and then BSOD. I haven't had a chance to reinstall uberOptions yet to try and get it to work again.
But then I always integrate the SP into XP using nlite, remove the bits I don't want and add the drivers I do. Then do a complete reinstall.
Personally I recommend doing a complete reinstall, (preferably with the new SP slipstreamed in), rather than just applying an SP over an existing installation.....if nothing else, it will get you to do a backup of all your data