Index: bp-core-adminbar.php
===================================================================
--- bp-core-adminbar.php	(revision 3749)
+++ bp-core-adminbar.php	(working copy)
@@ -291,8 +291,11 @@
 		return;
 	} elseif ( !defined( 'BP_DISABLE_ADMIN_BAR' ) || !BP_DISABLE_ADMIN_BAR ) {
 		// Keep the WP admin bar from loading
+
+		// Check if the function show_admin_bar exists before calling it
+		if (function_exists('show_admin_bar')) {
 		show_admin_bar( false );
-		
+		}
 		// Actions used to build the BP admin bar
 		add_action( 'bp_adminbar_logo',  'bp_adminbar_logo' );
 		add_action( 'bp_adminbar_menus', 'bp_adminbar_login_menu',         2   );
@@ -309,4 +312,4 @@
 	}
 }
 
-?>
\ No newline at end of file
+?>