Originally Posted by
northsideguy
Look at your itinerary again. The reason the SWU is not being applied is that United Flights on 16th July 2011 are operated by Continental Airlines. Currently as per Mileage Plus rules, SWU are not vaild for Continental Airlines since United does not operate that flight. You may want to call the Reservations, and try to have them honor the upgrade. Most likely, they'll say the same thing, but good luck and safe travels!

I'm guessing the OP has
CO SWUs, as his profile only mentions CO PLAT and not 1K.
I hope this isn't what lies ahead of us from the CO side to the new UA.