Haha, I've had similar problems with all my squash/pumpkins! They are mostly okay, but I check them every week to make sure none are going soft. I cut the bad bits out and use the rest for stew and soup. I've noticed making sure you get all of the stalk off the top of the pumpkin helps (its tricky, as they are woody and spikey) as that is where the mould seems to start to grow. That and wrapping them in old newspaper (just like you do with winter-apples.)

The hard frost began at the start of the month which killed off the last of my pumpkin plants, to be honest, I was surprised they lasted so long, the Summer was so good, our growing season has been especially warm but now it is just the kale and leeks that are growing, ready to be harvested in mid-winter. I do have a few miniture, half-grown pumpkins, now!