Which is worse: Flip-flopping or Hypocrisy?
Obama Says to Look at "Videotape" For His Flip-Flops
When Romney changes his position on an issue, it's a "flip-flop". When Obama changes his position on an issue, he's simply "evolving".
What would scare me infinitely more than a politician changing his/her mind based on new information would be a politician that sticks to a position in spite of new information or a change of heart because it's the politically expedient thing to do.