[Dovecot] Err. msg. while copy.: "Invalid internal data."

[Dominik Springer]

Hi All,

While copying 9360 messages from a local folder to a folder on the imap 
server
at message 5792 the client shows the following message from server:
"Invalid internal data."

The error is reproducible.
Any suggestions?

Configuration:
Versio: 1.0.rc15 (Debian Package)
OS: Debian etch (in XEN VM)
Kernel: 2.6.18-4-xen-686 (Debian Package)
FS: ext3
Mail-Client: Thunderbird 2.0.0.6 on Mac OS X 10.4.10



Br, thx
Dominik Springer