Palin doesn’t know if Obama was born in Hawaii or not so she can’t say one way or the other. No one other than Obama knows for sure and his closets friends and advisers know, but I give it very good odds that Obama was born in another country say about 95% chance.
As do I. I can't imagine anything else on the alleged long form being so damaging (The Dr's name? His birth height/weight? A different father(or mother)?)...that he'd go to the great lengths he has to prevent it from seeing the light of day.