Also I'm not being funny or anything, but how the hell do you change backgrounds in gnome 3.6 to your own picture? Right click desktop -> change background, opens gnome-control-centre on the background tab and it's got just one large button which you click and you have 3 tabs, go the middle one and the previous pictures I've used are there but I can't add/use any other pictures files, even dragging them in doesn't work? Is this honestly some late april fools joke or what!
click on ur name in the top right hand corner then click settings
in there click background