little guy doors leaking when towing.

I have the new style doors. While driving during a rainstorm, the windows leak.
I'm pretty sure its the window. I'm guessing that air pressure at highway speeds is forcing the water in possibly through the drain hole in the bottom of the window. I found a few other people on the little guy forum are having the same problem. Does anyone here have a similar issue with similar doors or windows.
http://littleguy.vanillaforums.com/disc ... omment_903

http://littleguy.vanillaforums.com/disc ... omment_903