@informundo: How many contact forms do you have, and do they all use a recaptcha? I’m having the same problem, but only for my 2nd contact form. I have 2, both using recaptcha, and the first one is fine.
The only difference for me, as far as I can tell, is that the extra text area is blank. Here’s the extra html being generated after my second form:
<div style="width: 300px; height: 60px; border-style: none; bottom: 12px; left: 25px; margin: 0px; padding: 0px; right: 25px; background: #f9f9f9; border: 1px solid #c1c1c1; border-radius: 3px;"><textarea id="g-recaptcha-response" name="g-recaptcha-response" class="g-recaptcha-response" style="width: 250px; height: 40px; border: 1px solid #c1c1c1; margin: 10px 25px; padding: 0px; resize: none;"> </textarea></div>