Hi Ian, I've added x2go-user list to this reply since I'm not sure if this is something for the devs.
 

 

I have been able to connect using windows client version 3.01-4 but not with 3.01-18


3.01-18 has never worked for me, it just won't connect succesfully. The latest version that seems to work well is 3.01-13, you can download it here: http://www.x2go.org/deb/pool-untested/x2goclient/x2goclient-3.01-13-setup.exe
 
Cheers,
Daniel