I did check again and this time I found it.
It was under December 9, 2010
https://www.senate.gov/legislative/LIS/roll_call_lists/roll_call_vote_cfm.cfm?congress=111&session=2&vote=00270
I think that's it.
The repeal of DADT was slipped in the week before Christmas, when all the weaselly leftist $h!t happens...