Since installing 10.5.7 I've had 2 kernel panics happen, and I never had any before that. The panic always happens when my display has turned off from idle time. I then come move the mouse or hit a key to turn the displays back on. The display comes on and then I get the error screen that says I must reboot. I'm suspicious of one of my add-on system prefs that may not be compatible with 10.5.7, but I don't know which one. Here's what I have loaded: Fan Control Flip4Mac WMV Growl MultiClutch nova media iSync plugins (it likely isn't this one because my first panic happened before I installed this add-on) Perian USB Overdrive (seems the most suspicious because I move the mouse or hit a key to activate the screen, which is when I get the panic) I have a Logitech wireless keyboard and mouse which is what USB Overdrive is used for. What alternative(s) can I try to USB Overdrive to see if it is the panic problem? Or, has anyone else had an infrequent panic similar to mine that they've found the reason for?