I was having trouble with the Zoom! achievement, to get the [pet]Zoom[/pet], so looked it up on Wowhead. Someone gave the tip to use a [pet]Fragment of Desire[/pet] (which, by the way, worked perfectly). I came to this site to see if anyone had mentioned it on here. Someone did, so I went to upvote them...
Only, apparently I'm used to sites where up is left and down is right, and accidentally downvoted the comment (bad eyesight + tiny buttons don't mix well either ). And as far as I can tell, there's no way to undo or change it, and now I feel bad about it. ;^;