Bug#581176: I just got bit by this

[Dominique Brazziel]

	Very bad business.  For a workaround
I had to set the login password to NULL.  Next
I deleted the 'vino.local' key from the login
keyring but it went right back in after 
resetting the password.

	This was a bad idea, as discussed 
here https://bugzilla.gnome.org/show_bug.cgi?id=344839,
but even after it was agreed to add the gnome-keyring
option, it was stated that it would be off by default.