Ticket #23887: 23887.2.patch

wp-includes/post.php

@@ -2655 +2655 @@
                 $previous_status = 'new';
         }
 
-        if ( empty( $post_format ) )
-                $post_format = '';
-
         $maybe_empty = ! $post_content && ! $post_title && ! $post_excerpt && post_type_supports( $post_type, 'editor' )
                 && post_type_supports( $post_type, 'title' ) && post_type_supports( $post_type, 'excerpt' )
-                && ! in_array( $post_format, array( 'audio', 'video', 'quote', 'image' ) );
+                && ! in_array( get_post_format( $post_ID ), array( 'audio', 'video', 'quote', 'image' ) );
 
         if ( apply_filters( 'wp_insert_post_empty_content', $maybe_empty, $postarr ) ) {
                 if ( $wp_error )