[squid-users] Facebook issue despite server_http11 on

[GIGO .]

Dear All,
 
I am using squid 2.7 stable 9 version the facebook was working fine since 
yesterday and suddenly the issue appears that a blank page comes whenever tried 
to access facebook. I have tried the recommended directive
 
server_http11 on
But the problem is unresolved please help.
 
 
regards,
Bilal