Ticket #22335: 22335.fix-wp-methods.diff

Index: wp-includes/class-wp-xmlrpc-server.php
===================================================================
--- wp-includes/class-wp-xmlrpc-server.php      (revision 22339)
+++ wp-includes/class-wp-xmlrpc-server.php      (working copy)
@@ -1034,7 +1034,8 @@
                                        return new IXR_Error( 401, __( 'Sorry, you are not allowed to publish posts in this post type' ) );
                                break;
                        default:
-                               $post_data['post_status'] = 'draft';
+                               if( ! get_post_status_object( $post_data['post_status'] ) )
+                                       $post_data['post_status'] = 'draft';
                        break;
                }