Well I just upgraded my computer to snow leopard, and Im very happy. It went very well, and was incredibly easy. I havent run into one problem as of yet. No compatibly issues, no spotlight problems, nothing. I also heard of people complaining that snow leopard was very slow when they upgraded and didnt do a clean install, well for me, I noticed a speed increase over leopard, and I just simply did an upgrade. Im very pleased with this new OS. I think apple did a very good job refining leopard. I just thought id share this with people, so they don't always have to read the things going wrong with an upgrade over a clean install. EDIT: Not sure if it matters, but I installed off of a usb drive.