I've experienced several bugs in the winter wonderland.
First. The race around winter wonderland. I failed my first attempt. When i restarted the race, and got selected to start it over again, I didn't get transported to the starting line and failed the race again and again.
Second. I had some epohs from last year. I exchanged them for 200 mark boxes. However, when I went to open the boxes, they did not contain 200 marks. They only contained 100 marks each.
Third. I tried to enter the gingerbread thing, and i didn't get transported anywhere. the queued message appeared and then, nothing happened. A friend that did get in said he got bounced out.
So, far the only thing that worked was the pie eating contest ... yah ... looks like I'm going to sit this out for a bit.