Yikeroo! Buddypress automatic and Blogs MU 1.2.1

Guys Gals,

Just ran the automatic upgrade from Buddypress 1.2.6 > 7 in the dashboard and got this error...

Fatal error: Call to undefined function bp_get_root_domain() in /nfs/c07/h01/mnt/99576/domains/mouthtosource.org/html/rivers/wp-content/themes/blogs-mu/_inc/functions/options-functions.php on line 347

Running WP 3.0.4.

Pretty major... and can't get into admin.

Can get into sub blog admin areas and sub blogs and pages although I haven't touched it since I went minimal.

http://mouthtosource.org/rivers/

Any tugs I can do via ftp to nurse the puppy up?

There is a awful lot of white space on the main blog ****

Appreciated, Paul