I've rather neglected my mac for a couple of weeks since I bought a well known phone. having a good look around tonight and some things don't feel or act right. apps are very slow to load, in photobooth the quality of the camera is very grainy and the whole app is very slow to run. theres other little niggles i see aswell. i installed leopard day of release and installed it over tiger but not sure when all this started. would i be better installing leopard again and what's the best way to do it.