Wenger's fault because he believes in zonal marking and not man marking (which would have put a defender up against the striker Carroll)
Chamakh's fault for his piss poor marking. Silly striker, you should know better!
Fabianski's fault for miss judging the flight of the ball and getting underneath it instead of going towards it with an allmight running jump as Carroll did.
Go the the root of the problem guys! Wenger's fault, somethhing you won't hear me say that often
Guide to beating Arsenal at set pieces.
1: Get a couple of tricky little runners to stand in the zones marked by the Arsenal CB's.
2: Get your tallest most beastiest player to stand in the zone marked by Arshavin or a forward that clearly has no defensive ability.
3: Get the runners to drag the CB's out of place, and get your beast to attack the space left open by the confused CB's that have started to chase the runners before realising that they're ACTUALLY marking a zone!