[squid-users] Problems POST-Method on Squid 3

Hello List,
I'am having problems with my squid 3 on Centos.
If I try to use POST-Method (e.g. Webmail, Bugzilla) the proxy returns

"Read Timeout"
No Error

I have no idea why this is happening.

Here's my Config:
<snip>
http_port 172.25.1.40:80
http_port 127.0.0.1:3128
hierarchy_stoplist cgi-bin ?
visible_hostname proxy.mycompany.com
coredump_dir /var/spool/squid
high_memory_warning 3000 MB
cachemgr_passwd secret all
cache_mgr root_at_mycompany.com
memory_pools off
cache_mem 1024 MB
cache_swap_low 90
cache_swap_high 95
cache_effective_user squid
cache_dir ufs /var/spool/squid 200000 16 256
access_log /var/log/squid/access.log squid
cache_log /var/log/squid/cache.log
cache_store_log /var/log/squid/store.log
pid_filename /var/log/squid/squid.pid
dns_defnames on
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern . 0 20% 4320
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl internal_if src 172.25.1.40/255.255.255.255
acl kutz src 172.25.63.152/255.255.255.255 172.25.63.134/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443 # https
acl SSL_ports port 8443 # psync-https
acl SSL_ports port 12120 #
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 CONNECT method CONNECT
acl QUERY urlpath_regex cgi-bin \?
acl snmppublic snmp_community public
acl mysys src 172.25.46.46/255.255.255.255
acl support.microsoft.com dstdomain support.microsoft.com
acl our_networks src 172.25.0.0/16 172.16.0.0/16 62.143.254.0/24 80.69.108.0/24
acl myspecial dstdomain .myspecial.com
acl ausnahme1 dst 172.25.22.198/32 172.25.46.206/32 172.25.46.218/32
acl ausnahme2 url_regex ^http://some.url.com$
acl ausnahme3 url_regex ^http://some.url.com$
acl ausnahme4 url_regex ^http://some.url.com$
acl ausnahme5 url_regex ^http://some.url.com$
acl ausnahme6 url_regex ^http://some.url.com$
acl ausnahme7 url_regex ^http://some.url.com$
acl ausnahme8 url_regex ^http://some.url.com$
acl ausnahme9 url_regex ^http://some.url.com$
acl ausnahmeA url_regex ^http://some.url.com$
acl ausnahmeB url_regex ^http://some.url.com$
acl ausnahmeC url_regex ^http://some.url.com$
acl ausnahmeD url_regex ^http://some.url.com$
acl ausnahmeE url_regex ^http://some.url.com$
acl ausnahmeF url_regex ^http://some.url.com$
acl ausnahmeG url_regex ^http://some.url.com$
always_direct allow myspecial
acl purge method PURGE
#broken_vary_encoding allow apache
acl apache rep_header Server ^Apache
request_header_access Accept-Encoding deny support.microsoft.com
http_access allow purge localhost internal_if
#http_access deny purge
http_access allow manager localhost kutz mysys
#http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
no_cache deny ausnahme1
no_cache deny ausnahme2
no_cache deny ausnahme3
no_cache deny ausnahme4
no_cache deny ausnahme5
no_cache deny ausnahme6
no_cache deny ausnahme7
no_cache deny ausnahme8
no_cache deny ausnahme9
no_cache deny ausnahmeA
no_cache deny ausnahmeB
no_cache deny ausnahmeC
no_cache deny ausnahmeD
no_cache deny ausnahmeE
no_cache deny ausnahmeF
no_cache deny ausnahmeG
cache deny QUERY
http_access allow our_networks
http_access allow localhost
http_access deny all
http_reply_access allow all
icp_access deny all
snmp_port 3401
snmp_access allow snmppublic kerpsys
snmp_access allow snmppublic localhost
snmp_access deny all
snmp_incoming_address 0.0.0.0
snmp_outgoing_address 255.255.255.255
<snip>

-- 
Han Solo:
	Wonderful girl! Either I'm going to kill her
	or I'm beginning to like her.