What is the caution?
Can you reproduce all this? Please send me the .gbf file for your database directly. Is this a VIBS database, or not?
There is no such thing as a "non VIBS R6". They are all the same units. Only difference is they keypad and headphones plugged in, and the software isn't actually aware that they are in fact plugged in.
As to whether it behaves the same on NT as on CE, I have no idea, but I would suspect the answer is yes. Please try to get yourself an R6 as soon as one becomes available. You are important to the testing effort. In the mean time, some one in support will need to be assigned to test your database for you.
Again, there is no such thing as a non-VIBS R6.