I used to have this sort of problem in 10.2.3, kernal panics all over the place using the SMB connection to windows machines. 10.2.4 fixed that, but it was crazy slow to see the machine and connect, and now 10.2.5 has made it really fast but there are still bugs in there that I've seen. I'd go ahead and submit it, but I can't reproduce it anymore (thank goodness!)