I voted in Potatoman's latest poll, but I must have clicked the wrong button (or the website had a weird glitch) because "my vote" isn't what I intended to click. Is there any way to change my vote? I can't find one, but that might be a useful feature to add to the site.

I don't think you can change your answer, but you can just comment that you meant to do another option if it isn't something you don't mind sharing your opinion on.