Registration Page Inconsistencies; Captcha Image May Not Display

Issue: Captcha image did not display properly in Firefox using the lower "register" link on the right side of most pages on qt-project.org, so registration failed.

Event:
There are two links that display in the login box to the right of most pages on qt-project.org. I attempted to click on the lower link where it says
"Not registered?

What are you waiting for? Just register and start collecting points. It's fun!"
Clicking the word "register" loads the registration form in a separate page. This registration form did not work for me but gave the following error message:

"The form you submitted contained the following errors
You must submit the word that appears in the image"

As no captcha had been displayed, I was perplexed. I eventually opened the Web Dev Console in Firefox and found the GET request for the recaptcha.net site (https://api-secure.recaptcha.net/challenge?k=6LcbOM4SAAAAAL_DAiy3oQJd0qXuiBSac3ec22Re)

When I typed this into the address bar of Firefox, I got the standard "This Connection is Untrusted/Get Me Out Of Here" Firefox message about not being able to verify security from recaptcha.net (since it's https), along with the following "Technical Details":

"api-secure.recaptcha.net uses an invalid security certificate.

The certificate is only valid for www.google.com

(Error code: ssl_error_bad_cert_domain)"

However, returning to the previous page, I found the upper registration link in the same box where it says "Register Here!" This opened the registration form in a floating page over top of the one I was on and displayed the Captcha image correctly. The URL for this GET request to recaptcha.net was different (http://api.recaptcha.net/js/recaptcha_ajax.js?_=1363065531387) and did not require Firefox to verify a secure connection.

Adding a security exception was necessary to get the Captcha to display properly on the independent page found through the lower link. Otherwise, before investigating the GET requests in the Web Dev Console, this simply failed quietly in the background and led to several failed registration attempts and much frustration on my part. I imagine it would lead to the same for others who happen to click on the "wrong" registration link, especially since my Firefox security settings are all default.

Suggestion: Are two links really necessary?