While messing about with this site I found that the hover rotating logo in the top left sometimes flickers back to its original position if you move the mouse off whilst it’s rotating. A simple fix was to add the following under the transform declaration.
figure#user_logo div.logo:hover{ -webkit-transform:rotate(30deg); -moz-transform:rotate(30deg); -o-transform:rotate(30deg); /* Webkit Rotation Flicker Fix */ -webkit-transform-style: preserve-3d; }