I don't mean to write off this survey, but it looks like it was mainly a survey about offshore drilling, and at the end they asked who they wanted fro president. I think the wording had a big impact. I still expect McCain to win this state in Nov., but it may explain the huge difference in numbers. This one's wording is almost like a push poll.
Rasmussen Reports conducted a special Florida survey to measure the immediate impact of the offshore drilling issue on the Presidential race. As one part of the survey, respondents were told that McCain favored offshore drilling
and said it would bring down the price of gas and oil. They were also told that Barack Obama opposed offshore drilling and said it would not bring down the price of gas and oil. After hearing the views of both McCain and Obama, most Florida voters agreed with McCain--61% said it was likely that offshore drilling would reduce gas prices. Only 34% disagreed and said that offshore drilling would not accomplish that goal.
But I guess it contradicts that when it says
However, after voters were told that McCain favored offshore drilling and Obama opposed it, McCain’s lead increased to eleven points, 49% to 38%.