[jasonlotito]

Even that form fails. The expiration date is where it falls down, failing to allow for auto-completion. Also, again, it doesn't show you the accepted credit cards. The error checking is delayed until you click on the button (which also means the error correcting is delayed as well). I didn't spend too much time with it.

I should also point out that this seems to be just one part of the checkout process, so there are cases where it would not work (though that's probably not the intended use-case for modal form).