I was wrong... From Yahoo:

How does scoring for blocked kicks work?
Blocked kicks are counted only in instances where a kick (FG, PAT, or punt) is touched by the defense and remains behind the original line of scrimmage.

If a FG or PAT is touched by the defense, but goes beyond the line of scrimmage, it is counted as a missed FG or PAT only.

Similarly, if a punt is touched by the defense, but goes beyond the line of scrimmage, the punter is credited with a punt of that yardage.

For example, Jason Baker has a punt touched by a Miami defender. The punt then goes 6 yards beyond the line of scrimmage. This would constitute a 6-yard punt, with no blocked kick awarded to the Miami defense.

** Please note that most recaps will refer to any tipping or deflection of a kick with the word "block." Therefore, there may be differences between the written accounts and fantasy scoring.