To see the major effect of this patch,
to see some polls, then pick "view answers".
Now you can see who voted for a given answer.
(If you want to play with it, users "testa", "testb", and "testc" all have password "test".)
From the patch:
# text questions are like this: # user1, user2 -- someanswer # and the rest are like: # someanswer # user1 # user2
(This also means a user may appear more than once under different answers if they picked more than one checkbox.)
Please help find bugs before I bother Brad with it. :)