[Dovecot] lazy_expunge vs mulberry

I've configured the lazy_expunge plugin exactly like it says on the wiki. I can't seem to configure Mulberry to find the new namespaces. Any hints?

I notice that the wiki says to use / as the separator. Mulberry has a setting for this, and the default is '.'. Leaving this as '.' in Mulberry and / in dovecot seems to work fine. (But I still can't access the .EXPUNGED or other namespaces.)

Another page on the wiki says that the default separator for maildir is '.'. Why does the lazy_expunge page suggest using '/'?

I'm very confused about namespaces.

-frank