D.J. Coffman had been participating in SketchBattle (a site that pits artists against each other, winner by votes moving on to the next round).
Apparently he had been having issues with the administrator of SketchBattle who, while welcoming the additional traffic coming from Coffman’s popular website, did not grasp the concept that a popular artist may have a good change of winning a popular vote against lesser known entrants.
Coffman blogs today that he dropped out of SketchBattle Season 3 after the Admin of the competition admitted in an IM conversation with him to changing the vote totals during and after the contest. Coffman posts his evidence, including screenshots and transcripts, here.
UPDATE: An actual discussion of this is still up on the forums at SketchBattle. The co-administrator of the site who played around with the vote tallies (he helpfully explains how he altered the number in the MySQL database) strikes me as pretty dense about how damaging his behavior is to the integrity and reputation of his site. His other co-administrator seems to get it, although hoping there’s no hard feeling between them and Coffman seems to be far too little, far too late. Also Coffman here posts a final thought on the episode.