Debugging this with the help of Mike#2 turned up the following: If you select an external X-Server in X2GoClient's settings, yet point it back at the VcXsrv that is shipped with X2GoClient, it will work, provided: - the options for the various X-Server modes default to this: -screen 0 %wx%h -notrayicon -clipboard -fullscreen -notrayicon -clipboard -multiwindow -notrayicon -clipboard -nodecoration -notrayicon -clipboard -screen 0 @ - you restarted X2GoClient after making these changes - you run a full desktop environment in windowed mode (it still crashes in single application/published application mode) The "-screen 0 800x600 -notrayicon -clipboard :0" entry is the most relevant one. Note that these settings may have unwanted side effects if you are using X2GoClient to connect in different modes. Especially, this *will* break Published Application Mode. Single Application Mode is unaffected, but running the problematic app this bug is about will still cause a crash in Single Application Mode. -Stefan -- BAUR-ITCS UG (haftungsbeschränkt) Geschäftsführer: Stefan Baur Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364 Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243