Warning: No xauth data; using fake authentication data for X11 forwarding.
This sounds like a possible security problem. Does anyone know what this means? I am using window maker, so it is possible this is something that would be cared for automatically by gnome.
Turn on verbose flags when you ssh and see if it's complaining about missing xauth.. (ssh -v -v user@xxxxxxx). make sure xauth is in your path too, or at least that SSH knows where it is (You can specify in your sshd_config)
Alternatively, if you aren't doing X11 forwarding, you can disable it by removin it from your config file or when you ssh do ssh -x user@xxxxxxx
