this has been his worst season at the club but then again thats going to happen when you`ve been at a club 6 or 7 years, even the maradona`s and cruyff`s went through tough spells in their careers.
off the top of my head though i can think of quite a few mistakes he`s made this campaign, he spilled a shot in the 4-0 loss away at spurs that adebayor tapped in, the one against norwich at home where he came out to the penalty spot to try an intercept a cross but holt got there before him and scored (once a keeper decides to go he`s got to get something on the ball), the mistake at fulham where he dropped the ball at dempseys feet (that was a proper clanger that one), the first goal away at city when aguero`s tame shot from distance went under him (i think i would have saved that one myself),imo he didnt cover himself in glory with the two goals at home to arsenal either, the first goal was a header inside the 6 yard box, that has got to be the keepers ball and the second goal went past him on his near post, then there was the carry on at sunderland where the ball hit the post, hit his head, hit the post again and pepe ended up looking around in a comical fashion trying to find the ball while bendner tapped it in.
even recently against stoke in the cup when crouch scored, he got caught in no mans land behind a stoke player.
he`s still one of the best keepers in the world but him having his worst season since he`s been here just adds to the missed pens and hitting the woodwork etc general frustration of the season.