samba - Jul 2010 - ADS join did not work, falling back to RPC

Hello,

I want to join a AD 2003 server. Kerberos work fine though I can get 
tickets with kinit/klist.

When I try to join the domain I've the following messages :

net join ads -Uadmin
Enter admin's password:
Failed to join domain: failed to find DC for domain ads
*ADS join did not work, falling back to RPC...*
Enter admin's password:
Joined domain MYDOMAIN.
ssctransit:~# net rpc testjoin
Join to 'MYDOMAIN' is OK

So it seems that I've successfully joined the domain. My question  : is 
the message in bold normal ?

Regards