samba - Apr 2005 - Problems with Winbind and NTLM Authentication

Hi all!

After upgrading from Samba2 to Samba 3.0.10 we have some serious 
problems with authenticating users with Winbind via NTLM to a NT4 
Domain.

After working for a while a strange error occurs in the Winbind log. 
Every authentication attempt ends with a serious error 
"NT_STATUS_PIPE_DISCONNECT". Can anybody tell me what?s happening
here?
Restarting winbind has no affect. The error keeps coming. After 
switching back to Samba 2 everything is fine.

I?ve searched Goggle and the Mailinglist archive but noone mentioned 
this error before.

Thanks for your help.

Thomas