I have never used the ebrake, so I know that didn't cause the hangup. As I said when I started this thread, several times when getting out of the car after driving some distance, I smelled hot brakes and thought I had a caliper hanging up. There was no difference in how the brakes behaved, but I figured I'd get it checked before I had a problem.
Every oil change at 10,000 miles I get the tires rotated and figured anything going on in there would be noticed.
We'll see if it recurs.