User blog comment:Ebob101/Any Likes and Dislikes of 1.1?/@comment-129.59.52.76-20111205053512/@comment-92.81.45.102-20111205125622

Really? That's odd. For me, the instant I beat the Wall of Flesh a hallow appeared, almost all the way to the Underworld, and the corruption expanded to there as well. Maybe it's a bug, who knows.