Index: wp-admin/includes/media.php
===================================================================
--- wp-admin/includes/media.php	(revision 18444)
+++ wp-admin/includes/media.php	(working copy)
@@ -274,7 +274,8 @@
 			$content = $image_meta['caption'];
 	}
 
-	$title = isset($desc) ? $desc : '';
+	if ( isset( $desc ) )
+		$title = $desc;
 
 	// Construct the attachment array
 	$attachment = array_merge( array(