Mail Sync & IMAP
When using Zimbra's BES connector and also an IMAP client, my Blackberry doesn't seem to sync perfectly.
The way I can reproduce this once a new mail arrives on both my berry and in my IMAP client, I read the mail in the mail client and then quickly move it to another folder.
When BES decides to reconcile my mail, it appears to lose track of the mail and the mail stays as 'read' on my Berry.
If however I force a reconcile, or wait for BES to reconcile and then move the mail, all is OK.