[Dovecot] Random quirks in 1.1-rc11

[Marc Perkel]

A little more information. One ove my server side folders became 
essentially inaccessable. The folder was empty. This folder is actually 
emptied by another process that reads and deletes the content of this 
folder. Using Thunderbird the message count showed as having 1 message 
but no messages showed up. I dragged a new message into the folder and 
that new message wasn't visible.

I then restarted dovecot and the folder started behaving normally again.

I'm going to download and install the latests to see if the bug goes 
away. Unfortunately it's not a consistent bug to reproduce.