[Samba] stub recieved bad data

[Chris Lounsbury]

Hello,
We are using samba as a primary domain controller.  The other day when my users tried to log on they started getting this error messae "stub recieved bad data".  When I tried to join a machine to the domain I got an error message that said "the stub recieved a null reference".  We have had samba up as a PDC for about 8 months with no problems until now and we haven't recently added any new users or programs.  Any help would be appreciated.
Thanks
Chris