Anyone ever have methods just disappear from a class?

All of a sudden, all the methods to a class in one of my class libraries disappeared. I USED the vcx, and interestingly, I couldn't get exclusive access (even after restarting my machine). When I view it with shared access, sure enough, all the methods for this class are missing (as are all the deleted rows - as if I'm viewing with set dele on, which I'm not).

I have to go to my backups, but that means losing a day and a half worth of work. Anyone ever experience this before? I thought I recalled seeing something about this once, but it's been a while.

I'm using VFP6 SP3. Don't know if its related, but I've been experiencing lots of crashes with the class browser (though I've always experienced lots of crashes with the class browser).

Any ideas on how to recover this would be greatly appreciated - or at least how to prevent it in the future.

Thanks in advance.