Both Nautilus 2.6 and 2.7 fail to list the available samba shares hosted on a
Win2000 machine unless there's an account on that machine with the current GNOME
user's name and a blank password. Otherwise, it automatically pops up a
permission error dialog without asking for a username or password.

However, manually entering in the path of an individual share's name still pops
up the user/password entry dialog and subsequently works fine. The command-line
smbclient works as well, when a password is supplied with the -L parameter.