News from the USB kernel panic front:
The 10.2.5 update, while successful for most users, has been anywhere from problematical to disastrous for more than a few. Since I was one of the few, I have been avidly following Apple's discussion boards on this topic. There are many, many posts. MacFixIt reports significantly larger than usual email volume related to trouble with the 10.2.5 update.
Most common symptom is kernel panics every 5 to 10 minutes which are USB related. Consensus is the system is choking on loading multiple connect devices in some configurations. Unplugging all USB devices stops the panics, but is obviously not a solution for those who use their devices regularily.
Apple phone support people have reportedly been admitting to some callers that there is a problem with USB in 10.2.5, and saying that Apple is working on a fix. Interestingly enough, it looks like this buggy update is already burned onto CDs and available at the Apple Store.
In my case, I had the 10 minute kernel panics, which led me into a 10 hour troubleshooting binge during which 10.2.5 fried the USB ports on my expensive graphic arts monitor. This is not an isolated case. I have already noted several other reports of USB monitor ports being disabled by this flawed update.
Expect more news and discussion as Apple's little goof snowballs over the coming week.