OK, I'm still having problems with WGN-DT on my D6K, I asked a friend that also has a D6K and he also can't get WGN-DT anymore since Monday. I called the station and was dumped into a voice mail box at engineering, left a discription of the problem and my home phone, no call back.
If you're having any problems with WGN-DT please update this thread and I'll try e-mailing the link to WGN, maybe someone will finally look into the problem at their end. Thanks - Rick