Comment 5 for bug 211966

The problem here is that nautilus may ask you to install samba. The installation will add you to the sambashare group (which alone has the permission to use /var/lib/samba/usershares), BUT the change is not effective until you log off and on again (run id in terminal to check)!!!

When user is asked to confirm samba installation, he/she should be informed about this OR the mount should be run with sg, if samba has just been installed.