this is a minor issue the developers should fix, but if you’d like to learn more, google for that php error (“Call-time pass-by-reference has been deprecated”).. it’s a php-specific problem, and as such, there’s lots of dialogue about it floating around..
better not do it that way, as updates will break your work. create an .htaccess and put the following in:
Redirect 301 /yourbbpressdirectory/register.php http://yourdomain.com/yourwordpressdirectory/wp-login.php?action=register
if you want to modify the files to fix the problem, remove the & symbol from within the line it’s complaining about:
/bb-includes/backpress/functions.core.php on line 499
