Y' ever notice that no matter how many times you proof read, some dumb thing still slips by? It's one and a half hours, of course.
You don't have any idea if it's supposed to go into the oven with the pumpkin's top on, do you? We didn't and it seemed to cook up fine, but my mom complained that the parts no longer matched. The pumpkin's color deepened while it was in the oven and it shrunk enough that the lid was no longer a perfect fit. (Still tasted great, though.)