Does anyone know what would cause System Preferences to "unexpectedly quit" every time the "Check Now" button for Software Update is pressed? My mom is suddenly having this problem running 10.3.4 on her FP iMac 800 Mhz 15". A couple days ago she successfully used Software Update to download and install Security Update 2004-06-07, but now when she tries to run Software Update, it causes System Preferences to crash. I'm not living in the same state, so I can't get my hands on the machine but so far I've had her reboot, and run MacJanitor. Neither one of those fixed the problem.