[squid-users] google always requesting captach through transparent proxy

[squid at proxyplayer.co.uk]

Google is requesting a captcha everytime I request a page as it is  
saying that my computer is doing something weird (via a proxy).

How can I get rid of this message from Google. I tried redirecting  
directly but it makes no difference. It seems like Google is pickingup  
a lack of headers as an issue.

auth_param basic realm AAA proxy server
auth_param basic credentialsttl 2 hours
auth_param basic program /usr/lib64/squid/ncsa_auth /etc/squid/squid_passwd
authenticate_cache_garbage_interval 1 hour
authenticate_ip_ttl 2 hours
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443
acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
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 Safe_ports port 1863         # MSN messenger
acl ncsa_users proxy_auth REQUIRED
acl CONNECT method CONNECT
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access deny to_localhost
http_access allow localhost
http_access allow ncsa_users
http_access deny all
icp_access allow all
http_port 8080
http_port 80
access_log /var/log/squid/access.log squid
cache_log /var/log/squid/cache.log
buffered_logs on
half_closed_clients off
visible_hostname AAAProxyServer
log_icp_queries off
dns_nameservers 208.67.222.222 208.67.220.220
hosts_file /etc/hosts
memory_pools off
client_db off
delay_pools 1
delay_class 1 2
delay_parameters 1 -1/-1 400000/400000
acl google1 dstdomain .google.com
acl google2 dstdomain .google.co.uk
always_direct allow google1 google2
via off
forwarded_for off
follow_x_forwarded_for deny all
cache_mem 512 MB