@mecho

I likely have underestimated both my M$-Nano and yourself in regard
to the unplugging and re-plugging maneuver you suggested in post #3.

Replugging USB devices usually triggers some sort of discovery
and adjustment somewhere or other. Maybe in the device firm-ware,
maybe in the OS, or both.

My M$-Nano now works just as well in Linux as it does in Win7.
I'm happy enough right now with the settings chosen for me in
both situations.

In Win7, I think there may be some further adjustments possible.
In Knoppix 6.2.1, I've found three mouse adjustment avenues;
none of these affect my M$-Nano.

I think this thread has accomplished what I was looking for initially.
Someone else may want to start a thread on 'Linux tricks for a Nano',
I'm not that obsessive.