[ILUG] Squid not allowing browsing

[Chris Boyd]

I'm running squid 2.5 STABLE5 and behind a PIX firewall. Whenever I set the browser for the proxy it gives me a Squid "Access Denied" in the browser. 
I'm not sure if there is an error in my acls or ? 
Here is the (I believe) relevant part of squid.conf

acl Safe_ports port 22          # ssh
acl Safe_ports port 443 563     # https, snews
acl Safe_ports port 70          # gopher
acl Safe_ports port 210         # wais
acl Safe_ports port 1025-65535  # unregistered ports
acl Safe_ports port 280         # http-mgmt
acl Safe_ports port 488         # gss-http
acl Safe_ports port 591         # filemaker
acl Safe_ports port 777         # multiling http
acl CONNECT method CONNECT
acl mynetwork src 10.133.0.0/24

http_access allow mynetwork
http_access allow localhost
http_access deny !Safe_ports
http_access deny CONNECT
http_access deny all

Here's the access.log:

1124897668.136    102 10.133.2.42 TCP_DENIED/403 1457 GET http://mail.yahoo.com/favicon.ico - NONE/- text/html
1124897675.723    924 10.133.2.42 TCP_DENIED/403 1427 GET http://google.com/ - NONE/- text/html
1124897675.840    117 10.133.2.42 TCP_DENIED/403 1449 GET http://google.com/favicon.ico - NONE/- text/html