Funny the 3D transform stopped working on [my site](http://www.guybennett.com) with Chrome as well (still works in FF and Safari), and I am using the webkit prefix (with “transition” not “transform” — could that be the issue?).
@chrisburton — Thanks for pointing me to about:flags, which I was unaware of. Even with that however I was unable to figure out what was wrong and so wound up reinstalling Chrome — the 3D transforms work as they should now. I appreciate your help.