Thanks, CL. My knee problem was a direct result from overdoing a century ride a month or so ago. I really overdid it ... and I knew it. Being 41 years old, it just takes time to heal.
I can run just fine, thank goodness, or else I'd go nuts. It's the part of the knee most involved in pushing downward on the pedal that was injured, a part that's not used much in running.
I still could feel it some this afternoon so I skipped the ride home and will pick it up next week.