I just updated this page with my test results: http://wiki.x2go.org/doku.php/doc:de-compat

Note that for Cinnamon 1.4 to work, in X2Go Client, you must specify the Session Type as: Custom Desktop: gnome-session-cinnamon

Compatibility issues with Cinnamon are being tracked in bug #150. http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=150

-Mike#2