Comment 13 for bug 219892

A reboot or login/logout solution didn't work for me. So, I did what pajarraco recommended and it successfully got me to another error message. ;-P
Because I was setting up my system as a file server using Samba in a Windows AD domain, the new error message said that I needed to add ...

usershare owner only = False

to the Global section of smb.conf in order for it to work. Everything worked fine for me afterwards.