Comment 3 for bug 995406

I also have the same problem on Precise which has had clean install. The user is in the group sambashare.

I'm not able to workaround this: I've tried creating the share logging in as another user who has administrative privileges but I get a different error message (something to the effect that I don't own the folder to be shared. I'm able to do shares of folders owned by users with administrative privileges.

This is a real pain. Surely, it should be regarded as having high priority: it's common for Windows users to want to access folders shared by Ubuntu users.