I'd have been happy with them if they hadn't added the blue border but they're looking pretty ugly on my sites so I've switched them off. Shame. Maybe with some feedback to the Adsense team, they might change it by Easter.
Yes, I have noticed this too on my site. Blue and white? Come on Google, it is not very chrismasy, is it? Red and green come to my mind for christmas (this would have looked good on my site). I say sack the google designer.
I think they fixed the bug with the background color. On some of my sites I have ads with dark backgrounds and frames, and they all changed to the christmas ads with the white background and baby blue borders They only come only from time to time though.
hyip that looks pretty good, but the others are pretty bad, I like how you made the border light blue really works with the snow theme...
As my ads are set with no borders - the blue borders on my site look terrible... however, it has doubled my CTR and CPM so I can't complain too much Merry Christmas... all... ho-ho-ho
It took a while for mines to activate and when they did they were just plain ugly so I removed them but I agree with fryman they are eye catching.