I have an aluminum iMac running Snow Leopard at 3.06 gHz with 4 GB of memory. I'm also using Illustrator CS4 which has proven to be quite buggy and I can't seem to pinpoint the problem. It will open documents of various sizes and complexity for five to six times with no trouble, either over a network or locally. However, I'll try to open or create a new document and the beach ball will spin. I'll have to force quit Illustrator, but even when I relaunch it the same...