Under version 13 -

A. I get strange debuggers and syntax error notification with WeakSets
when merging an mcz file into an empty package. Is this a known issue?
if not I'll document it better and rereport.

B. Doing the above merge, I get a conflict about the new class
categories introduced, which isn't really a conflict, is it?

C. After doing keep, the working copy is marked dirty, while in fact it
is identical to the package merged (I think). Any reason?

Daniel