It's...inconsistent. Maybe one keystroke out of every hundred, I do something -- stretch with those left fingers towards the 3-5 keys and stretch with the thumb towards the space bar or something, I dunno -- that hurts like hell. Most of the time everything is hunky-dory (or getting there, at least, there's still a little just general stiffness)...but sometimes, I can't figure out why, but sometimes I line up all those digits just wrong, and get a really sharp pain jolting up my arm from that thumb.
It ain't the end of the world by a long shot, but I'd really like it if my doc could figure out what was wrong and what (if anything) we can do about it. It's just really weird, right now.