when i start gnome-do with --debug option i get this output
:~/temp$ gnome-do --debug
Unhandled Exception: System.TypeInitializationException: An exception was thrown by the type initializer for Mono.Unix.Native.Stdlib ---> System.DllNotFoundException: libMonoPosixHelper.so
at (wrapper managed-to-native) Mono.Unix.Native.Stdlib:GetDefaultSignal ()
at Mono.Unix.Native.Stdlib..cctor () [0x00000]
--- End of inner exception stack trace ---
at Mono.Unix.UnixMarshal.AllocHeap (Int64 size) [0x00000]
at Mono.Unix.UnixMarshal.StringToHeap (System.String s, Int32 index, Int32 count, System.Text.Encoding encoding) [0x00000]
at Mono.Unix.UnixMarshal.StringToHeap (System.String s, System.Text.Encoding encoding) [0x00000]
at Mono.Unix.UnixMarshal.StringToHeap (System.String s) [0x00000]
at Mono.Unix.Catalog.MarshalStrings (System.String s1, System.IntPtr& p1, System.String s2, System.IntPtr& p2, System.String s3, System.IntPtr& p3) [0x00000]
at Mono.Unix.Catalog.Init (System.String package, System.String localedir) [0x00000]
at Do.Do.Main (System.String[] args) [0x00000]
Unhandled Exception: System.TypeInitializationException: An exception was thrown by the type initializer for Mono.Unix.Native.Stdlib ---> System.DllNotFoundException: libMonoPosixHelper.so
at (wrapper managed-to-native) Mono.Unix.Native.Stdlib:GetDefaultSignal ()
at Mono.Unix.Native.Stdlib..cctor () [0x00000]
--- End of inner exception stack trace ---
at Mono.Unix.UnixMarshal.AllocHeap (Int64 size) [0x00000]
at Mono.Unix.UnixMarshal.StringToHeap (System.String s, Int32 index, Int32 count, System.Text.Encoding encoding) [0x00000]
at Mono.Unix.UnixMarshal.StringToHeap (System.String s, System.Text.Encoding encoding) [0x00000]
at Mono.Unix.UnixMarshal.StringToHeap (System.String s) [0x00000]
at Mono.Unix.Catalog.MarshalStrings (System.String s1, System.IntPtr& p1, System.String s2, System.IntPtr& p2, System.String s3, System.IntPtr& p3) [0x00000]
at Mono.Unix.Catalog.Init (System.String package, System.String localedir) [0x00000]
at Do.Do.Main (System.String[] args) [0x00000]
This is a problem with your mono installation. You are missing libMonoPosixHelper (read the output).
see bug 401069