"Guess, looking for confirmation that ocassional knee pain is common to many sports..So far has not gotten anything like after my getting out of running..." A risky attitude to take, if you don't mind my saying so.
Whether or knee pain is common in other sports, I would strenuously maintain that it is not (or need not be) an inherent part of cycling. I'm not a doctor, so I'm only conjecturing, of course, but I would worry that, if you consider some level of knee pain to be expected, you may wind up doing real damage. Do the opposite: operate on the assumption that knee pain is a sign of something wrong, at least on your bike set-up, if not with your knees themselves. Get the bike checked by a good shop, and if that doesn't work, get your knees checked by a doctor, perhaps one familiar with cycling and its attendant stresses.