Index: bp-core/bp-core-buddybar.php
===================================================================
--- bp-core/bp-core-buddybar.php	(revision 6757)
+++ bp-core/bp-core-buddybar.php	(working copy)
@@ -27,7 +27,7 @@
 		'show_for_displayed_user' => true,  // When viewing another user does this nav item show up?
 		'site_admin_only'         => false, // Can only site admins see this nav item?
 		'position'                => 99,    // Index of where this nav item should be positioned
-		'screen_function'         => false, // The name of the function to run when clicked
+		'screen_function'         => '__return_false', // The name of the function to run when clicked
 		'default_subnav_slug'     => false  // The slug of the default subnav item to select when clicked
 	);
 
@@ -104,7 +104,7 @@
 
 	$defaults = array(
 		'parent_slug'     => false, // Slug of the parent
-		'screen_function' => false, // The name of the function to run when clicked
+		'screen_function' => '__return_false', // The name of the function to run when clicked
 		'subnav_slug'     => false  // The slug of the subnav item to select when clicked
 	);
 
@@ -214,7 +214,7 @@
 		'user_has_access' => true,  // Can the logged in user see this nav item?
 		'site_admin_only' => false, // Can only site admins see this nav item?
 		'position'        => 90,    // Index of where this nav item should be positioned
-		'screen_function' => false, // The name of the function to run when clicked
+		'screen_function' => '__return_false', // The name of the function to run when clicked
 		'link'            => ''     // The link for the subnav item; optional, not usually required.
 	);