[@collectif-dont-panic Participant 11 years, 6 months ago]

Hope my reply will help :

https://buddypress.org/support/topic/cant-register-new-users-on-my-buddypress-site/

[@collectif-dont-panic Participant 11 years, 6 months ago]

Hi there !

I was exposed to the same issue today, with BP 1.7.2 and WP 3.5.2.

Solved by checking the php version of the site, the php version should be 5.4 ( use the function <? phpinfo(); ?> to check that.

Other thing, like have said @baskers, ensure you have only lower caps in your url.

Hope my reply would help someone else ! 🙂