I'm starting to feel severely disappointed with Leopard. I didn't have this problem the first few days, but the last two days several applications will be open and running but the application window disappears. The main programs I've been having problems with are iTunes and Entourage. iTunes will display the application menu and act as if iTunes is open, but I can't get the program to actually display, even if it's playing music. The commands on music files work, but I can't get the equalizer or any other "window related" command to function properly. Similar story with Entourage. My inbox will not show up or disappear after awhile, and if I go to send a new email from the menu, only the recipient field will display, but not the newly created message. It seems to mainly be an issue with these two applications, but it wasn't doing this the first couple of days. The only solution is to restart, which usually results in the problem reoccurring. Is anyone else experiencing this? I tend to think it's an issue with the graphics card, or some kind of graphics-related issue. I'm running a Core Duo 2.16 GHz iMac with a GB of RAM.