Just installed x2go, mac client 3.99.20 on os x 10.6.8, server running ubuntu 11.10 and x2goserver 3.1.1.0. The mouse seems to work well once I figured out to use a custom desktop with command "gnome-session --session=gnome-fallback" . But the keyboard is scrambled. For example hitting the j key results in an l in the terminal, hitting f types 2, etc.
I tried frobbing the keyboard settings both on the server and in the x2go client and no dice. I also tried an external keyboard (this is on a macbook pro), same problem. Only workaround I've found so far is to run the linux client in vmware on my mac. The keyboard works then. I googled and didn't find too much on this issue. Seems like it was raised before on this list but I didn't see any resolution: https://lists.berlios.de/pipermail/x2go-user/2011-August/000301.html
Thanks for any ideas, Marty Vona