An interesting thing about this is that the second vote went:
Paul 42%
Clinton 32%
Obama 22%
Then on the third ballot:
Paul 46%
Clinton 42%
So 4 percentage points of the 22% Obama got went to Paul after the second ballot, 10 to Hillary, and 8 did not vote.
I know several Obama people who I've tried to get to vote for Paul who said that if it was a Hillary-Paul general election, they'd vote for Paul.