Pretty crazy... Mason-dixon has been good in Florida so it's strange to see such a wide spread between them (+6 for Romney) and so many others... regardless, someone is going to look bad Tuesday night.
I would be very surprised if it doesn't go to Romney. In 2004 RCP had FL at Bush +0.6, and the actual result was Bush +5.0 Rubio and Scott also underpolled in 2010. Obama 2008 was right on the mark while he underpolled in most other states. Cuban Republicans are likely under-represented in polling.