Index: wp-includes/post.php
===================================================================
--- wp-includes/post.php	(revision 19277)
+++ wp-includes/post.php	(working copy)
@@ -2439,9 +2439,11 @@
 		$previous_status = 'new';
 	}
 
-	if ( ('' == $post_content) && ('' == $post_title) && ('' == $post_excerpt) && ('attachment' != $post_type) ) {
+	$empty_content = ! $post_content && ! $post_title && ! $post_excerpt && post_type_supports( $post_type, 'editor' )
+		&& post_type_supports( $post_type, 'title' ) && post_type_supports( $post_type, 'excerpt' );
+	if ( apply_filters( 'wp_insert_post_empty_content', $empty_content, $postarr ) ) {
 		if ( $wp_error )
-			return new WP_Error('empty_content', __('Content, title, and excerpt are empty.'));
+			return new WP_Error( 'empty_content', __( 'Content, title, and excerpt are empty.' ) );
 		else
 			return 0;
 	}