3.6.6 domain join issues

[Herb Lewis]

I have one machine that is giving the following errors while other 
machines running
the exact same software join the domain with no problems. I've compared 
everything
I can think of between a working and non-working setup. Any ideas where 
to look
for why this is failing?

[2012/09/24 23:11:45,  0] 
/src/samba/source3/libads/sasl.c:908(ads_sasl_spnego_bind) kinit 
succeeded but ads_sasl_spnego_krb5_bind failed: Cannot contact any KDC 
for requested realm