Who changed the rules

[les_taxi]

I seem to remember if the arm deflects the flight of the ball to the advantage of the defender its a penalty.
Why not just award a "penalty goal" no need to send player off

[darren-b]

Attempting to play the ball with your chest (which he admits he was) whilst having your arms away from your body is asking for trouble.

Type of decision (the sending off not the penalty) that could go either way so in my opinion the ref wasn't incorrect to send him off.