So whenever Leopard came out I installed it on my G4 Mac Mini (1GB max RAM), and despite it chugging a bit at times, I decided this week to revert to a fresh install of Tiger. Well, despite losing out on a few things, namely Time Machine (which I think was the cause of a lot of the chugging), I cleared out about 25GB of crap from my 80GB hard drive - mostly apps I never used, various downloads floating around, etc. All I loaded back on were essential apps, documents, photos, and some music. In any event, it's always good to do this periodcally. if you notice things are starting to slow down - Safari still runs like ass on my computer so I've had to go Firefox exclusive until I eventually bite the bullet on a new iMac.