
I fixed mine...
...by using the "turn off A/C module, disconnect the battery for 5 minutes, reconnect battery, start car, and don't touch A/C for 5 minutes" technique recommended by MichiganSilver03.

Thanks MichiganSilver03! Your contributions make this site a worthwhile place to visit!
To this techinque I added cycling the vent control button through all of it's positions (after first touching nothing for 5 minutes)... floor, dash, defrost, floor-dash, floor-defrost, etc... so that the actuator and blend doors could get some excercise, and have an opportunity to have their relative position "read" by the HVAC computer module. I repeated this entire modal cycle a few times, with full fan dialed at max cold, waiting a while in each mode for it to "register." Now there's a subtle pun.
All in all it took about 30-40 minutes of button pushing (and $30 bucks in gas idling (joking)). Instead of disconnecting the battery for just 5 minutes, I actually let it sit for a couple of hours.
So far (just 1 day) so good... time will tell if this fix will last, and/or how often this relearning will have to occur.