[Boost-users] "Trac thinks your submission might be Spam. To prove otherwise please provide a response to the following."

Hi all, I would like to make contributions to Boost on trac https://svn.boost.org/trac/boost, but whenever I would like to make comment a bug report, it gets recognized as spam, and I'm redirected to a captcha-page that I think should contain a captcha, but does _not_ https://svn.boost.org/trac/boost/captcha#trac-add-comment. Any hints? Cheers, Nico