Blackberry Zimbra Connector Seen Flags

[pge]

Hey everyone,
we recently switched to secondary phones with Blackberry and I have been an enthusiastic Zimbra NE User until now. (iPhone)

Using the Blackberries with IMAP Accounts (Zimbra OS) we experience problems with seen flag synchronisation.
E-Mails read on an external E-Mail client are not flagged as read within Blackberries Mailclient.

Would this also be the case in a NE + Blackberry Connector scenario?
Thanks,

Patrick