[squid-users] Squid 2.5 with NTLM Auth (Samba3) Locking out Accounts in Active Directory

We are currently having an issue with account lock-outs which appear to =
be caused intermittantly by squid. It seems to mostly affect users =
logging into secure sites (ie. hotmail etc) but it doesn't seem to souly =
affect secure sites.

We're running Redhat 9.0 and squid 2.5/samba 3.0 was installed from =
source following the procedure below

http://itmanagers.net/article-4--0-0.html (not sure if this link is =
currently working)

Active Directory is currently running 3 Domain controllers all on =
Windows 2000 Server's

the uses seem to get prompted for basic Authentication when they're =
accounts get locked

Below are some messages from the /var/log/messages which from the forum =
archives seem that these aren't an issue

Apr 20 12:01:38 server winbindd[1220]: process_loop: Invalid request =
size from pid 28089: 1304 bytes sent, should be 1568=20
Apr 20 12:06:43 server winbindd[1220]: [2004/04/20 12:06:43, 0] =
libsmb/cliconnect.c:cli_session_setup_spnego(683)=20
Apr 20 12:06:43 server winbindd[1220]: Kinit failed: Cannot contact =
any KDC for requested realm=20
Apr 20 12:11:43 server winbindd[1220]: [2004/04/20 12:11:43, 0] =
libsmb/cliconnect.c:cli_session_setup_spnego(683)=20
Apr 20 12:11:43 server winbindd[1220]: Kinit failed: Cannot contact =
any KDC for requested realm=20

how can I troubleshoot the issue?