Guy Carnegie's dashboard

How can I straighten the poto frames on my walls? It's driving me batty! I've already set straighten anything above 0 degrees, but still the frames are squint.

I'm quite happy to also keep straigh icons everywhere else, but shouldn't the straighten icons option also straighten the frames. Also, is there any way to "lock" icons in place? Right now, even clicking them seems to move them a little - although I guess that's the idea of a "real world" interface.