Testing WebKit 3d rotations

Although these are nominally WebKit features (using -webkit CSS prefix) they work in neither Chrome 7 on Mac OS X nor WebKit nightly on Fedora - both of them do some token transforms, but they seem to ignore the perspective origin. I'd seen similar on previous 3D transform demos, so it's nothing to do with my code AFAIK.
References:

By default the rotations are relative to the centre of the containing section - this is noticeable when you look at how the identical (HTML-wise) 15deg DIVs have rendered differently at the top and bottom. Move the mouse to change the perspective origin.

Click this to toggle the RotateX/Y section visibility

Debug text appears here
Regular DIV
rotateX=15deg
rotateX=30deg
rotateX=45deg
rotateX=60deg
rotateX=75deg
rotateX=90deg
rotateX=105deg
rotateX=120deg
rotateX=135deg
rotateX=150deg
rotateX=165deg
rotateX=180deg
rotateX=15deg
x