Ease up. It's not hurting anyone to have the extra white space there, and it's more than likely just a small error on someones part. Perhaps an unexpected error due to file conversions. Just give it a few days, the pic will be fixed soon enough.
It is annoying, and maybe if you complain about it, the person who posted this will crop their images next time they submit one. It's easy to do with MSpaint, and everyone with a PC has it. It shouldn't be allakhazam's responsibility. I sumbited an item the week LoY came out and the link allakhazam posted is broken, but it still hasn't been fixed. He's a busy guy :)