IanB said:This is wrong. Immediate actions taken when it is not your turn always apply to your next turn's limit, not the previous turn. Essentially, it is at the end of your turn that your immediate/swift action counter is reset.
You never have to worry about movement on your turn interfering with your ability to use this feat - it can only interfere with what you do on your next turn, and that's assuming you treat the movement from this feat as a normal 5 foot step.
It is called a 5 foot step, so it is one. If they had meant 5 feet of movement, they would have said so.
You can move 5 feet in any round when you don't perform any other kind of movement. Taking this 5-foot step never provokes an attack of opportunity. You can't take more than one 5-foot step in a round, and you can't take a 5-foot step in the same round when you move any distance.
Just because swift actions and immediate actions reset immediately after your turn in the round does not mean that the 5' step resets immediately after your turn in the round.
The 5' step resets on the next round and is a round based game mechanic, not an end of turn based game mechanic. Granted, with the introduction of immediate actions and the introduction of non-spells as immediate actions, it makes sense that they should change the 5' step rule as well. But, they have not done that yet TMK.
Now, if you have some Immediate Action rules that change the core 5' step game mechanic, I'm willing to listen.