I bought three units of Montana 650T, and after software actualization to 3.4 and early version, the GPS showed problem with the tuch screen.
The first unit was chaged by Garmin and the second is on claim.
The third unit have 2.2 original software, and now my friend is updating, tryng to get the sma problem.
I do not know if is a series problem or just the batch of production.

somebody know this kind of problem on Montana6XX series?