Walcott was out for a year with injury. He's come back at a time when we are winning most of our games and we have a lot of forward players available so he's found it hard to break back into the team. In a way, that's a good thing. But we know he's a decent player and has plenty to offer the team, and earlier in the season when we weren't playing so well, the team - and the fans - were crying out for him.
Now suddenly Wenger has a vendetta against him? Or he has "attitude problems"? Besides demanding a better salary 2 years ago, Walcott has a perfect professional attitude. For once, some people in this thread really are living up to the "fickle arsenal fans" name that we seem to get (usually unfairly) tarred with by fans of other clubs on this forum.