Recently I've had the opportunity to rain test my Zumo 660. The results while not fatal haven't made me an overly happy camper. The system for the most part seems waterproof. However I until the unit/cables dry out I will randomly get a "USB cable plugged into wrong port" message. I'm not sure where the problem in the system is, whether its the GPS itself or the microUSB or 3.5mm jack on the cables. Has anyone seen this issue and know what is necessary to resolve the problem? Alternatively how does one waterproof a 3.5mm jack and an allegedly sealed microUSB port?