Index: wp-admin/admin-ajax.php
===================================================================
--- wp-admin/admin-ajax.php	(revision 15177)
+++ wp-admin/admin-ajax.php	(working copy)
@@ -890,7 +890,8 @@
 			'supplemental' => array('postid' => $pid)
 		) );
 	} else { // Update?
-		$mid = (int) array_pop(array_keys($_POST['meta']));
+		$_POST_meta_keys = array_keys( $_POST['meta'] );
+		$mid = (int) end( $_POST_meta_keys );
 		$key = $_POST['meta'][$mid]['key'];
 		$value = $_POST['meta'][$mid]['value'];
 		if ( '' == trim($key) )
Index: wp-admin/ms-edit.php
===================================================================
--- wp-admin/ms-edit.php	(revision 15177)
+++ wp-admin/ms-edit.php	(working copy)
@@ -104,7 +104,8 @@
 			$move_users = array();
 			foreach ( (array)$users as $user ) {
 				$user_meta_value = unserialize( $user->meta_value );
-				if ( is_array( $user_meta_value ) && array_pop( array_keys( $user_meta_value ) ) == 'subscriber' )
+				$_user_meta_value_keys = array_keys( $user_meta_value );
+				if ( is_array( $user_meta_value ) && end( $_user_meta_value_keys ) == 'subscriber' )
 					$move_users[] = $user->user_id;
 			}
 			if ( false == empty( $move_users ) ) {
Index: wp-app.php
===================================================================
--- wp-app.php	(revision 15177)
+++ wp-app.php	(working copy)
@@ -223,7 +223,8 @@
 	 */
 	function AtomServer() {
 
-		$this->script_name = array_pop(explode('/',$_SERVER['SCRIPT_NAME']));
+		$_SERVER_SCRIPT_NAME_array = explode( '/', $_SERVER['SCRIPT_NAME'] );
+		$this->script_name = end( $_SERVER_SCRIPT_NAME_array );
 		$this->app_base = site_url( $this->script_name . '/' );
 
 		$this->selectors = array(
Index: wp-includes/wp-db.php
===================================================================
--- wp-includes/wp-db.php	(revision 15177)
+++ wp-includes/wp-db.php	(working copy)
@@ -1398,7 +1398,8 @@
 			// Return an array of row objects with keys from column 1
 			// (Duplicates are discarded)
 			foreach ( $this->last_result as $row ) {
-				$key = array_shift( get_object_vars( $row ) );
+				$_object_vars = get_object_vars( $row );
+				$key = reset( $_object_vars );
 				if ( ! isset( $new_array[ $key ] ) )
 					$new_array[ $key ] = $row;
 			}