I've posted a few questions here over the last few months and most of the advice was useful. Well, i have finally resolved my crashing issues under Jaguar and it was all due to faulty RAM.
So as a follow-up on this situation, why does the Apple Diagnostic CD pretend like it is testing RAM and really it is just printing out a message saying all the RAM is fine when in actuality it is not? After troubleshooting everything else I could find, I finally decided to try a few different RAM test utilities and all of them told me that my RAM was fine, until I tried Gauge Pro 1.2 from Newer Technology. After booting off a 9.1 CD and running GaugePro from OS 9 it gave me about 50 errors during the RAM test.
Regardless, after buying some new CL2 RAM from Crucial a few weeks ago I have not had one crash or even a damaged file (fsck error) system. I can't believe that Apple would ship a test CD that doesn't really test anything.
So for anyone else experiencing similar random crashing, get GaugePro and test under OS 9.
What about the new non-OS9 booting machines? I don't know. Any suggestions for a RAM test utility that works under X?