These include a couple of tweaks for LIS, client fixes, and IP phone tweaks, etc:
Lync Client 32 bit http://support.microsoft.com/?kbid=2467763
Lync Client 64 bit http://support.microsoft.com/?kbid=2467763
Lync Attandant http://support.microsoft.com/?kbid=2467760
Lync Attandee (Admin Level install) http://support.microsoft.com/?kbid=2467762
Lync Attendee (User level install) http://support.microsoft.com/?kbid=2467762
Lync Server 2010 http://support.microsoft.com/?kbid=2493736
Lync Group Chat http://support.microsoft.com/?kbid=2467765
Lync 2010 Phone Edition for Polycom CX700 and LG-Nortel IP Phone 8540 http://support.microsoft.com/?kbid=2493722
Lync 2010 Phone Edition for Aastra 6721ip and Aastra 6725ip http://support.microsoft.com/?kbid=2493724
Lync 2010 Phone Edition for Polycom CX500, Polycom CX600, and Polycom CX3000 http://support.microsoft.com/?kbid=2493723
64bit version is corrupted