Here is an article from CNN called, What to do when you're labled "overqualified." This is a somewhat common problem for experienced - sage - applicants. Has this happened to you? Check out the article for some tips. And I would add this:
I think the notion of someone being overqualified is sometimes code for fearing they lack a hunger to learn and a contemporary skill set. Don't let this become a barrier. Talk about how you have grown in the last year. Talk about the new technologies you use to stay up to date in your field and to communicate with team members. Show that you are genuinely fascinated in the job duties (you should be or don't apply).
Show the interviewer that you don't get bored because your are always seeking to learn and improve the organization from your position - all positions can have impact.
Oh, and make sure all these things are true by staying hip and sage. The best protection of all, like gore-tex in the rain.