i got the car back on wednesday, and the window seems to be working. it's only been a couple days, and i'm cautiously optimistic. the dealer replaced just about everything that has anything to do with the window. i still don't want to say the name of the dealer just yet, in case the issue goes south again, i really don't want this to turn into any kind of dealer-bashing. when i'm confident it's fixed for good, this will turn into a glowing review of what has been, so far, a fantastic dealer experience. they were even nice enough to leave my car inside during the holidays and the following snow storm, provide a loaner car for 2 whole weeks, and wash my car better than i do myself, post-warranty, no charge.
fingers crossed it stays fixed!