I am continuing to have problems with the new member signup on the business theme. I've tried almost everything, including removing all site plugins and it still doesn't work. I just completed an upgrade to buddypress 1.2.1, and bp-business-1.0.5 and it has gotten worse. I am running WordPress MU 188.8.131.52
Currently the "Signup" button is not showing on the front page.
If I go to http://mysite.com/register and complete the registration form it just returns me to the registration page without creating an account.
I went back the the bp-default theme and the registration process works fine.