I was playing in a very strong wind. After I had addressed the ball it moved. Did I incur a penalty?
Answer: Before 1st January 2012 Yes, From 1st January 2012 No
The rule on this situation is changing from the 1st January 2012.
Normally a player is deemed to have moved the ball if it moves after being addressed. A new exception states that if it is known or virtually certain that the player did not cause the ball to move this rule does not apply. (Rule 18-2b)
The definition of addressing the ball will also change from 1st January 2012.
A player has addressed the ball when the club is grounded immediately in front of or behind the ball, whether or not you have taken your stance.