CVS HEAD problems with concurrent access to a big IMAP box

[Thomas Glanzmann <sithglan@xxxxxxxxxxxxxxxxxxxx>]

Hello together,
I am using mutt CVS HEAD, as usual, and IMAP Courier Server on Debian
stable (woody). However I open a mailbox with ~ 25.000 mails in it. This
takes a while, of course. However I have the mailbox already opened in a
second mutt and delete some mails in it and press sync. (The other mutt
is still on fetching the message headers). 

Than I get some errors like:

Cannot open message 25136
...

And mutt stays with this message there and does nothing. Okay as usual I
am going to track this down and fix it. However I don't want to read all
this IMAP docs. Is it mutt who should handle this case or is it
cyrus-imap?

Does the IMAP-Server notifies the client during a fetch that a specific
message isn't available?

        Thomas