Okay, I'm still on 5.0.2 here, so these may be non-issues. Tried under FF2/win32 FF3b5/linux
First.. when I move a contact from one folder to another, it doesn't show up in the new location. I tried this with an existing folder and a new folder, and by DnD and right click -> move. The contacts show up on reloading the client.
Second, when I created a new folder, auto-complete didn't pick up entries in the new folder, nor did it show up in the To: dialog. Also.. works after reload.
And on a completely different note.. I don't know how many people around here use external LDAP auth, but I've seen a few questions where people simply haven't created Zimbra users for the LDAP accounts. I've got a small app here at work for managing LDAP accts that I'm working on polishing up. If anyone's interested I might share it, although it's an interesting contraption.