BuddyPress Fatal Error on Signup

Just realized that my sign up process hasnt been working since the day I upgraded!

I'm getting this...

Fatal error: Call to undefined function bp_is_directory() in
>> /home/thatmlmb/public_html/wp-content/themes/bp-genealogies/lib/html.
>> php
> on
>> line 93

The theme developer double checked the theme and confirmed that "all those functions are core Buddypress template tags, so if they are not found, it's because BP is not being loaded."

I did a test install (also bp 1.1.2 and wpmu 2.8.5.2) and get this fatal error:

Fatal error: Call to undefined function bp_is_blog_page() in /home/thatmlmb/public_html/mu/wp-content/themes/bp-genealogies/lib/html.php on line 125

I then removed the theme as a test, now the register page just gives a 404.

Any idea where to start troubleshooting this?