I have similar problems with
x11vnc 0.9.13-1 libvncserver0 0.9.9+dfsg-1 0 when starting with -no6 -noipv6 -rfbport 5902, I saw the output of: 25/01/2013 12:15:51 Listening for VNC connections on TCP port 5902 25/01/2013 12:15:51 Listening for VNC connections on TCP6 port 5900 and netstat -atpn showed x11vnc listening on :::5900 However, after downgrading libvncserver0 to 0.9.7-2+b1, this doesn't happen anymore.