Just got a new 2.4GHz, 24" iMac. When I go to "Energy Saver" under "System Preferences", the system will hang for about a minute or two. A few times it even completely froze, and I had to force quit. Is anyone else having this problem? I'd appreciate it if anyone could test it out on their new iMac and see how long it takes to open or if it hangs. Thanks! For the record, other than that...everything is working beautifully! Feels great to be back on a Mac!