Hey, I have two gigs of ram on my macbook, and at times i experience serious video lag. The windows move slow when using expose. some programs are slow to open. it happens to get really slow when using software update. I'm not using any Rosetta apps. I know the graphics card isn't great, but i'm pretty sure i'm not supposed to notice it. I'm sure the ram is installed right. It shows up when i go to "about thiis mac'. I was wondering if anyone else experienced this, or has an suggestions on how to fix it?