His headline reads [emphasis added], "WASHINGTONPOST: We were biased for Obama. Oops. Sorry..."
The links goes to Sunday's column by WaPo's ombudsman, Deborah Howell, who tallied up the raw numbers from the campaign and found that, to a very small degree, the Post during the general election ran more Obama articles and photos than McCain. Howell though, made no conclusions about the contents of the articles or whether the Post was "bias" toward Obama and was unfair to McCain.
That's just what GOP spinners like Drudge are claiming.