I've just installed Snow Leopard on my Intel Core 2 Duo 2.4 GHz iMac 4MB RAM and there are some issues. (Modest system for 3D but generally runs fine). Playblast doesn't work, that is it won't open a Quicktime window. Maya also changed my character's colours for no reason. I noticed that Autodesk has Service Pack 1 available. Do I need to install this? I bought this app in June (installed from a CD).