Index: wp-admin/includes/plugin.php
===================================================================
--- wp-admin/includes/plugin.php	(revision 19296)
+++ wp-admin/includes/plugin.php	(working copy)
@@ -1318,12 +1318,10 @@
 		$url = '';
 	}
 
-	$url = esc_url($url);
-
 	if ( $echo )
-		echo $url;
+		echo esc_url( $url );
 
-	return $url;
+	return esc_url_raw( $url );
 }
 
 //