Comment 6 for bug 573608

"very unclear error messages" is an understated description of the root cause: error

On a new Lucid installation, with samba installed, error report is identical to:
http://ubuntuforums.org/showthread.php?t=1318879

Restarting (not just logging out) does allow me to share a folder via Nautilus. Though, samba reports quite a few error (see thread above) when starting.

I am not sure the minimal steps to get it working, I basically tried everything I could find in the forums, such as:
http://art.ubuntuforums.org/showpost.php?p=7600170