[Zope] Zclass corrupted, possibly

I'm beginning to suspect that my Zclass that holds all of my stories is somehow corrupt. It's catalog-aware, and I'm having terrible problems searching the catalog and tremendous drags on accessing Zclass instances. I've been banging on this server for about two weeks, and this is the best I can come up with. Is there a good way to create a new zclass and transfer all of my existing instances into it?