Repeated CAPTCHA for authenticated users on g.d.o

Well, I'm pretty sure I'm posting this issue in the completely wrong location, but I don't know a better one currently.

On http://groups.drupal.org, I need to enter a CAPTCHA each and every time I want to post something. My signature contains only a link to our homepage, http://www.unleashedmind.com. Even for short posts, g.d.o challenges me.

That's pretty annoying, and I guess, there must be going something wrong. I would expect that a system would learn that I'm a human, once I've correctly entered a CAPTCHA.

I have not used Mollom yet. So please don't sue me if this is the wrong place... Is this a configuration setting? Or does the Mollom service not work (recognizing me) properly? Or does this module simply not provide this feature (storing a status for each authenticated user)?