Hey,
 
You can call `org-reload' with an universal argument.
Oh thanks, noted!
 
This is indeed a cache corruption. 
Does the cache persist to disk? Can I clear it?
 
I can recall exactly what I did, but after playing around with some things, exporting started working again on without setting the cache to nil. I guess I did clear that cache, and would love to know how ;)

Thanks a lot for all your help, 
Shlomi