Update: Took the unit in to have the oil changed before our trip and as the service guy was pulling it into the bay, he noticed the "service engine soon" light came on again. He put it on a meter and said it showed another sensor. He cleared the computer, the light went out. Stopped at Trail-lite in Warsaw and they replaced the entire frame/door. Still showed some leaking around the door gasket when they hosed it, added extra gasket and said that was about all they could do. Apparently the door we have is one of ten that were put on the B+'s before they changed door manufacturers. The service manager did say to stop back on our way home if there were any more problems, but we're going to wait and see how the new door works out. I also mentioned the various problems we're having, especially the engine light. He put in two cans of "dry gas", said moisture could be causing the problem. We put on 1,000 mi., and so far no engine light. For the most part, they were very willing to correct the door leak. I was also given a short tour of the plant and it seemed to be very well organized, however, the quality and efficiency of the assembly appeared to be much better than the end result. All in all, no problems on this trip. Did you find out anything more about your mildew problem?