reCAPTCHA on my registration page is broken

I have your anti-spam pack installed. Recently upgraded to WP 3.5 and latest version of Studio theme. When I try to create a test user, I keep getting the same error over and over:

"The reCAPTCHA wasn't entered correctly. Please try again."

I even went to the reCAPTCHA site and got new public and private keys and entered them into my reCAPTCHA settings. Still doesn't work.

Any idea how to fix this?