I think a couple of them are unfair (supporting the idea of "stimulus" isn't the same as supporting Obama's stimulus, hiring a lawn company isn't hiring illegals, saying TARP should end isn't same as flipping on your original support and his auto bailout stance was more nuanced).
Republicans are well versed in Romney's various flips and flops. This video is a good indication of how Democrats would introduce Mitt to the wider electorate. It isn't pretty, is it?
BTW- I'm not fond of spreading Democratic propaganda about Republicans but...a lot of the case for Mitt has come down to "he's electable". Maybe, maybe not but don't think the Democrats and Obama are going to roll over because folks like Jen Rubin swoon over Mitt because he's supposedly the only grown up Republican in the race.