ReCaptcha not working within post content

The ReCaptcha has stopped working after upgrading to WordPress 3.6. This happens only for forms that are displayed as part of the post content. An extra textarea is displayed below the captcha box and the bottom of the captcha box is a bit funny. It also keeps saying that the entered captcha is invalid. Has anyone else seen similar behavious? Thanks

Here is the screenshot:
https://docs.google.com/a/mojandroid.sk/file/d/0B4LbMosdd7z3M2VqV2s0ZEVqZkk/edit?usp=drivesdk

http://wordpress.org/plugins/ajax-contact/