using ReCaptcha and Polymer together doesn't work in Firefox (challenge questions do not show)

I'm having some serious issues using Polymer in conjunction with Google's ReCaptcha. Everything is peachy in Chrome, but in IE and Firefox, ReCaptcha fails to load the challenge questions. I've started a SO question on this topic here, so feel free to respond there with suggestions!http://bit.ly/1CT1goN: Argument 1 of Window.getComputedStyle does not implement interface Element.Above is the error I get when clicking the checkbox to load the challenge questions. -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.