FYI -
I replaced my 2004-era Linksys EFG120 with a QNAP 251+ over the weekend.
When I attempt to 'join' the ldap directory on my SME 9.2 server (QNAP -> Privilege -> Domain Security -> LDAP)
* The QNAP screen remains on "please wait" forever
* /var/log/ldap/current on the SME server shows lots of activity, including successful connections from the QNAP, but also showing lots of "fd=xx closed (connection lost)"
* After waiting 5 minutes or so I click 'Refresh' on the QNAP screen, then agree to the javascript warning to 'Leave Page'.
* User and group accounts from the SME now appear in the 'User' and 'Group' screens on the QNAP
* I can login to the QNAP web interface using credentials from the SME server.
However, if I change the QNAP Samba settings from "Stand-alone server" to "LDAP domain authentication", I can no longer access QNAP samba shares (from my mac using finder) at all.