Unexpected mailbox reservations

[janne.peltonen at helsinki.fi]

I found this in the mailing list archive:

  http://lists.andrew.cmu.edu/pipermail/info-cyrus/2009-November/032078.html

However, there were no answers. John, did you figure it out? We seem  
to have run into sth similar: we have two users the quotas of whom  
can't be changed. Nor shown using imap (using the quota command does  
work). Reconstruct doesn't help. And the same error of a reserved  
mailbox. But checking with cyr_dbtool, the state of the mailbox is the  
same as the state of all the other mailboxes, on the murder frontend  
and backends.