There will also be a new rule prohibiting players from leaping over blockers in an attempt to block a punt. Receiving-team players trying to jump over a shield-blocking scheme has become popular for teams in punt formation. Receiving-team players try to defeat this scheme by rushing into the backfield to block a punt. In some cases, these players are contacted and end up flipping in the air and landing on their head or shoulders.

The Football Rules Committee raised concern about this type of action and proposed a rule similar to the leaping rule on place kicks that does not allow the receiving team to jump over blockers, unless the player jumps straight up or between two players.

http://www.ncaa.com/news/football/article/2012-02-24/changes-approved-2012-season