I have BP installed on WPMU and I believe these two issues may be related.
In the admin bar within a sub blog:
– My Blog–>Create Blog ends up creating a blog within a subblog ( site.site.mainsiteurl.com). Acceptable behavior would be all new blogs are created in main blog URL
– Menu Bar–>siteurl.com links to subblog URL (site.mainsiteurl.com
Thanks for your help