samba - Jan 2004 - winbind utils not working as non-root user

I restarted the smb service yesterday (I haven't restarted it in a long
time) and now the winbind daemon doesn't work as a non-root user. I
discovered this when Squid (configured to use ntlm_auth) started
prompting everyone for login info, and it never accepts the login. When
I run (for example) "wbinfo -t" as user squid, here's the results
 
checking the trust secret via RPC calls failed
error code was  (0x0)
Could not check secret

I've restarted the whole server, and still have the problem. I'm pretty
sure it has something to do with the winbind "pipe" file. Here's
the ls
-la for that directory:
 
[root@nbproxy01 winbindd_privileged]# ls -la
total 8
drwxr-x---    2 root     squid        4096 Jan 21 17:39 .
drwxr-xr-x    4 root     root         4096 Jan 22 09:34 ..
srwxrwxrwx    1 root     root            0 Jan 21 17:39 pipe
[root@nbproxy01 winbindd_privileged]#

 
What could the problem be??