I just saw a magpie out my office window here in Eagle River. The bird's beak was deformed in a similar manner to pictures I have seen of some different species of birds here in Alaska--the top half and bottom half were both quite long, and curved toward each other, so they literally overlapped by at least 3/4". I keep a 10X50 binocular handy, so I got a good look at the bird, from about 50 feet away.
I haven't personally seen any other birds with this characteristic. Is it quite uncommon?