The same thing happened in 2008. A couple of polls came out near the end showing the margin in Pennsylvania suddenly shrinking to mid single digits, people began to panic, think McCain had real momentum in the state, and then Obama won by 10% on election day anyway. It's the same song and dance every year.
Last time F & M was showing it close to the final. This has closed, much more than I thought.
Obama's GOTV in 2012, is not the GOTV of 2008. No registration drive. So far, little efforts in the base area.
I still call the state for Obama.