This is our very first RV...Just purchased a brand new 2013 rockwood roo 21ssl toy hauler.. Took it out for the first time in a rain storm and the tent ends leaked like a siv.. The tent ends had previously seen alot of rain while set up at the dealer and have had a chance for threads to swell and seal. Also noticed mold growing on underside of mattresses so had been getting wet for a while.. Took it back to dealer and they can't find leak??. Anybody else out there had similiar issues. Heard that maybe leaking from top seal while ends are closed???..