The community ads from 2015 are still being served. I don't know if this is normal during some kind of transition phase or if it's a legit bug, as I never would have noticed were it not for the new ad sizes.
In any case, this is definitely not a 2016 ad:
That comment link resolves to Community Promotion Ads - 2015
Updated 2016-01-21: The wrong year's ads are still being served, but now they're being stretched to fit:
Updated 2016-01-29: The 2015 ads are still being served, but I haven't seen a stretched one for several days.
I have not yet seen one of the new ads, though several have passed the vote threshold needed to be served.