Yup, the two-piece door leaks with the top popped up.
It's not like you're going to wake up in the morning to 2" of water on your floor, just some spits and drips on the inside surface of the door, and then only if the rain is coming from the right direction. At least that's my experience.
As far as "problems," the Palominos just aren't the best built campers on the market is all. If it's in good shape and cheap enough... WHO CARES?
It can fall apart in a year or two and you won't be out much, but if you maintain it and even store it inside, you'll get several years out of it.