Arsenal supporters point to referee Massimo Busacca, who showed striker Robin van Persie a second yellow card for time-wasting when he shot on goal after the referee had whistled play dead.
Ellis almost touched down again before one more venomous left hook to the ribs - Maccarinelli's most effective shot - sent him to the canvas for a second time.
And it was Henry who got his second of the match on the stroke of half-time. with his shot beating Giles, although the 'keeper should have done better.
Blackpool had the more urgency, knowing a win would guarantee a play-off place, but could not find a way past Gerken for the second time in the game although substitute Stephen Dobbie's rasping 25-yard shot was tipped over.