One of the whales, steemed, got upset because someone (not me, I wasn't paying any attention) said something bad about his voting behavior, so he made this announcement:

"steemed [5:25 PM]
Because daned can not help but vote up harassers and vote down vested members of the community, I will now downvote anything high value, circle jerker, and insidery. With full weight."

And he apparently decided this post fell into that category and downvoted it with all his accounts (he has a lot that he mined with). So all the downvotes you're seeing is basically from one ticked-off guy.

Actually, from his quote, I guess Dan and Ned (that's what he means by daned I think) didn't say anything about him, he's just upset they upvoted someone else who said something bad about him.

Somewhat humorously, to my mind, neither Ned or Dan upvoted this post.