I don't either, depending on how many stories there are. Unfortunately, I somehow don't think that all that many members vote unless they already have at least once submitted a story. Which means that while it's not fair to be forced not to vote for yourself in such a small contest, often I believe that the authors of the stories end up being the bulk of the posts as well. That's how I feel, at least.
So if you didn't submit a story: GO VOTE!