Those stats are pretty meaningless because what they don't show is how many goals conceded that the keeper should have saved. We've conceded 15 goals in the league this season and these are the ones where Howard has been at fault:
5 goals from headers inside the 6 yard box because Howard failed to come and claim crosses. A keeper should be using the considerable advantage he has in being able to use his hands to come and claim crosses wherever possible. We concede so many goals from headers inside the 6 yard box because Howard prefers to leave crosses for his defence to deal with, but no defender will win every header.
3 goals (2 v Man U, 1 on near post v Man City) where Howard dived the wrong way, before the shot was taken, because he was trying to anticipate where the shot was going in order to make up for the fact that his reflexes are now much slower. The two against Man U he may not have saved anyway, but he made it much easier for the scorers.
2 goals against Watford that, in my opinion, he should have saved. He seemed to dive under the the ball.
Granted, other players also made errors that contributed to those goals, but no one has made as many as Howard. That's 10 out of 15 goals conceded where he should have done better. Where would we be in the league with a better keeper? At the moment, top four.