Looking at your site, I don't see that mod_pagespeed is able to rewrite any resources (images, js, css, etc.). Can you check your apache error_log
file to see if there are any relevant messages being generated by mod_pagespeed? If you don't see anything, try setting LogLevel info
in your apache conf file and restarting.
Often when mod_pagespeed is not able to rewrite a resource it is because it failed to fetch it. If this is indeed the issue, the best solution is to configure ModPagespeedLoadFromFile
if your environment allows it. This allows mod_pagespeed to bypass serf, the HTTP fetcher it uses, and load files directly from disk.