As I mentioned in my original posting, I can do
exactly the same
(F8->menu->"send Ct-Al-De") with my client (xvnc4viewer) when the server
(WinVNC) is running on Windows. Alas, this doesn't work with the same
client and the server (x11vnc) running in a TDE session.
Does it work when you run FVWM or TWM instead of TDE?
Nik