[Samba] Domain connection fails

[Binx Bolling]

I am using 3.0.21rc2 on fc4. After I upgraded from 3.0.14a, I found that I 
cannot connect to my DOMAIN. I am using DOMAIN security. In 
log.wb-DOMAINNAME I find the following lines which may be related to the 
problem:
[2005/12/14 18:14:09, 0] nsswitch/winbindd_dual.c:child_read_request(49)
  Got invalid request length: 0
[2005/12/14 18:14:09, 0] libads/kerberos.c:ads_kinit_password(164)
  kerberos_kinit_password MACHINENAME$@DOM1.DOMAINNAME.COM failed: Cannot 
find KDC for requested realm
[2005/12/14 18:14:09, 1] nsswitch/winbindd_ads.c:ads_cached_connection(109)
  ads_connect for domain DOMAINNAME failed: Cannot find KDC for requested 
realm

Because of the failure to connect to the domain, I cannot authenticate as a 
user and am unable to access samba shares. Is this a bug or am I doing 
something wrong?