The last time I had my car in I had mentioned the sporadic "rebooting" of the NAV system ("Lost GPS signal - please wait...") - which of course stopped happening just afterwards. In any case, the Acura Tech Line told the dealer tech to replace the NAV/Audio unit, which they ordered and installed (Part 39540-TY3-A11RM) while my car was in for its headlight replacement. I obviously can't tell if it has made any difference because the rebooting was so infrequent (though it did seem to occur multiple times when it did occur), but I was surprised that that was what had been suggested. I will report back if I get any more symptoms, but nothing seems any different at the moment.

I did check my version settings both before and after the work was done, and nothing has changed in the software. My version settings are the same as the other Sport Hynbrids, but I'll post them here.