Thanks Jim, good suggestions, but no joy.

No telling how long I've been running version 1113, since I'd assumed the check-for-updates function was accurate. But, I've now updated to 1114 and did the Styles rebuild, but still getting those warning messages.

I have been using a lot of styles lately while creating quick-and-dirty practice backing tracks for a setlist for a band I'm filling in with, so it appears something's gone wonky with styles. Interesting that, as far as I can tell, everything seems to be working and sounding just fine after I get through those "Your current drum kit ... " warnings.