(This is actually a 3.0 beta 3 bug, but there is no option for this yet). On Red Hat 9, removing the Samba RPM (built from the source RPM) does not completely remove winbind's service files, in particular /etc/rc?.d/*winbind. I think this may be due to the lack of a "chkconfig --del winbind" in the %preun section of the spec file (I see there is one for the smb service).
fixed in 3.0 CVS
originally reported against 3.0.0beta3. CLeaning out non-production release versions.
sorry for the same, cleaning up the database to prevent unecessary reopens of bugs.
database cleanup