xfermailbox oddities

[Frank Elsner]

Hello,

we need to migrate mailboxes 

from 2 backend hosts, Solaris 10, cyrus-2.3.16 
to   2 backend hosts, RedHat Enterprise Linux, cyrus-2.3.16

in an murder environment.

During our initial testing we discovered the following problem:

"xfermailmailbox" transfers the user's mailbox and sieve filter just fine
from source (Solaris) to destination (RHEL).

But all mails in the "xfer"ed mailbox show up as unread on the destination host, 
no matter which client used.
Futhermore the seen file on the source host remains there, the seen file on the
destination host is somewhat smaller.

What's going on? 

- Why show the mails up as unread?
- Why isn't the seen file "xfer"ed as is?


Thanks in advance,
Frank Elsner