I am using this theme in bbpress (but the error is coming in posts too).
I can see that while I insert a Captcha, it comes infront of the text box not allowing a visitor to comment. I have used other captcha and the same issue is there in my other site using the same theme as well.
e.g. page. see comment area>> http://www.bolodesh.com/forums/topic/will-nandan-nilekani-loose-his-credibility-by-joining-politics-congress/