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.
Even good pollsters should have occasional outliers. (For example, that Pew national poll a few weeks ago that had Romney+7.) So it could be that M-D had an outlier. It also could be that they haven't adapted well to the cellphone era. We'll see.
I think M-D had one previously that showed Romney up by 6, which is probably too large.
