I've got a MBP 17" 2.33 using the latest OS and pretty standard software. It's actually my wife's since she swiped it. I'm stuck with the Dell. Anyway, it's been panicking for quite a while now and someone told me to repair the permissions to hopefully address the problem. After I repair permissions and go to re-verify them, there's always a new list of broken permissions including one, "SUID" that says it can't be repaired. So I bought a ext. HD (WD Essential SE 750 that's going back) that dismounts in the middle of Time Machine's backup process. I'm unable to re-format it on either computer and it's so slow in transferring files I can't even drag and drop 35G worth of music files without something going wrong and killing the whole process. I hear that a better option to back this thing up would be a 1T Iomega drive with ext. power. For all I know it's the USB supplied power that's causing the dismount problem. My question is, is it possible that the Mac may have gotten infected with a virus or other malware and it's the cause of this kernal panic problem or is it just a bad OS release that's become corrupted over time, or is it a hardware issue? The logic board was replaced about this time last year out of warranty by Apple along with one RAM stick and the screen. I've always suspected the new logic board is bad but Apple won't agree with me so I'm forced to save all the important files and wipe the drive, re-install the OS, and install all the other software from the backup disk and I don't want to re-install malware (if there is any) from the backup. Any advice would be appreciated. Thanks.