I tested this behavior a little bit, it does not apply to the profile picture but when you submit an other picture it appears to be rotated 90° left. So I manually rotated my pic 90° right to counter this, unfortunately the picture appears exactly the same way as before so I suspect it to not be just a rotation 90°left

EDIT: here's a screenshot http://i.imgur.com/efngFHN.png (on the picture I uploaded the sky should appear at the top)