I manage the site mirskylegal.com and today tried to install a plugin called BuddyPress Links. I did not realize it was not compatible with WordPress 3.1 and now when I try to visit the site and the back end of the site I receive this message:
Fatal error: Call to undefined function is_site_admin() in /home/mirskylegal/mirskylegal.com/wp-content/plugins/buddypress-links/bp-links-core.php on line 704
Please help. I have no idea how to fix this.