sub-folder delivery

[nlevy]

I'm having a problem with cyrus-imapd 2.0.13. 
I had upgraded from 1.6.24 where I could deliver to a subfolder with the
user+folder@mailhost.  After the upgrade (and on a different server with
a new installation) it does not work.  I've tried many different
combinations of ACLs but to no avail.  There are no error messages, but
mail simply gets delivered to the INBOX rather than the sub-folder.

Any help would be greatly appreciated.

-Nimrod Levy