Folks, it's all about turnout.
The party internals of this poll are similar to others: McCain +83 with GOP, Obama +80 with Dems, Indies are very close, 5% - 10% undecided.
My best guess is this poll oversamples Dem vs. Rep by 2 to 3 points. Equal weighting = dead heat.
Undecideds and Indies will break for McCain. If GOP vs Dem turnout is at least about equal to slightly lower (within a couple of points), McCain probably wins. If Dem turnout surges to an all-time high and GOP turnout is low, the Dems win.
In other words, the only poll that counts is on November 4.