If you want to check the difference: http://www.bong.tv/jquery/de/2.5/javascript-packed.js => FF = 168kb http://www.bong.tv/jquery/de/2.5/javascript-packed.js => Safari or Chrome = 609kb Thanks for any help!! Posted at Nginx Forum: http://forum.nginx.org/read.php?2,95852,95934#msg-95934