Put OK on the left and cancel on the right
Windows UI convention is to put the Cancel button on the right and OK on the left. Yours is opposite of that and it really threw me.

The Cancel/OK vs. OK/Cancel argument is an interesting one, and there’s actually some decent research on the subject (http://measuringuserexperience.com/SubmitCancel/index.htm) – people are split pretty evenly between the two orderings, unless the buttons are spaced far apart, in which case Cancel/OK is preferred by a majority. In the end the choice is pretty arbitrary, but I think we’re going to stick with Cancel/OK as an ordering and hope that the coloration of the buttons helps to clear up any platform-specific confusion. Sorry for the confusion!