Re: Register vs wp-signup : passwords vs signup question
The register.php page is a BuddyPress-specific theme file that let’s you more easily customize the user registration page. It is found in the /registration/ directory of the parent theme bp-sn-parent. When it is in use, it takes over the duties from the wp-signup.php page which is a WPMU file. You can use either one, but I find it easier to use the register.php page.
Also, read this thread. The OP created a new Captcha plugin for WordPress that is compatible with version 1.1.x of BP:
Here’s the direct link to the plugin in the WP repo: