@wb53tx: Hmm.. that's odd! I can open Encryption and Keyrings fine. Maybe you have a dodgy install of Linux Mint? I don't know much about the internal workings of Linux Mint, but maybe you could benefit from a reinstall of the gnome-keyring-daemon..?
By the way, Encryption and Keyrings is of no help when it comes to saving authentication info for Smb4k because Smb4k expects Kwallet and nothing else. This is because it was built for KDE and not Gnome, although still compatible with it.
Sorry I can't help with your gnome-keyring-daemon problem, though.