A while after I installed Snow Leopard I started to notice odd glitches I can't think how to describe them. They appear randomly and don't follow anything specific. Anyway has anyone else experienced these? They only started appearing once I had snow leopard installed. I have an early 2008 Macbook 2.4 GHz with an Intel GMA X3100. Here are some screenshots so you can see what I'm on about, thank you if you can help.