Comment 4 for bug 357315

OK I also got the error on Ubuntu 9.04 (64 bits), fresh installation.
The problem disappeared the minute I installed samba

$ sudo aptitude samba

Still, the error message from Ubuntu is not very helpful when people have not installed the "samba" package yet and wish to share some directory. Ubuntu should at the very least say "sharing of directories requires the installation of a new software package, do you wish to proceed and install that package now?" or something like that. You get the point.

The defect is genuine, and hopefully not hard to fix.

my 2 cents.