I've just taken delivery of a new 27" iMac. On the whole I'm very happy with it, and Mountain Lion, but I do have one niggle. My previous Mac had Snow Leopard, and that worked a lot better at tiling wallpapers. If it was a portrait wallpaper it would tile it about three times, if it was a landscape wallpaper, it would end up filling the screen, as it was nearly big enough anyway. The other tiles were only small round the edges. This is just what I wanted. Mountain Lion seems to shrink the wallpaper when it's landscape size though, as though you always want to see multiple copies. Does anyway know a way of tiling wallpaper in Mountain Lion without shrinking it, even if it means buying a wallpaper changer app?