I am attempting to setup my new sinology has at home. I gave the guest account read only, and logged into it form my ubuntu 12.04 system. Then realized I wanted to create a user, created it, and gave the user full rights and would only like to give guest read access.

But ubuntu remembers that guest account and won't let it go. How do I make it forget?

Basically, how do I make the samba client or the keyring forget a windows share login on the client side?