I know it's been a while since you started this thread, but I just came across it while investigating a similar issue. If it's any consolation, I have the same problem, and I don't have VFP 5 installed. I'm using SP3, on a PII 266 machine.

I've had this problem so much that I've virtually given up on the class browser.

And lately I've experienced some corruption to one of my classlibs and I'm wondering if there's a connection. All of a sudden, all the methods from one of my classes disappeared. Interestingly, I can't get exclusive access to the VCX. When I browse it using shared access, the methods memo field is empty. I back up regularly, so I lost only a day's worth or work, but it was a lot of work. Really pisses me off. This is the second time this has happened to me.

I think I read something about this problem a while back - that's what I was searching for when I came across your problem.