but it seems the most recent comments are the only ones I can remember actually saying anything positive about LCC. Good for them. I've been using Logitech mice for a long time but never had the need to try LCC (wait, I think it did work for me back in OS9, but I never even tried to upgrade after that), so have managed to avoid all the documented headaches I guess. My MX310 with 6 buttons has never caused me any grief through many iterations of OSX from 10.2 to the present 10.4.11, and I strongly suspect it's thanks to USBOverdrive. For any of you suffering any seemingly unsolvable mouse problems I highly recommend you give it a try.