frustrating indeed. Hopefully you get the comp UG, sounds like you will with a K fare. If not, there good until the end of Feb 2010 so maybe you can use it for a flight the beginning of next year.

On the other hand, I would have started a thread with the exact opposite title. I am flying a short RT flight with a connection each way, (EWR to DSM connecting in MSP) planes are a E175 to a CRJ900 and vice versa. The cheapest fare was in a 'K' class so I called Delta after I purchased the ticket and low and behold, I was able to use two of my remaining PMU's to UG on the spot.