After receiving the info and logfiles from Benedikt I was able to reproduce the problem when going over a slow link.
The problem occurs in the "network speed" estimation for new VNC clients. If the VNC client disconnects during this measurement it could lead to an invalid client pointer that is still being observed. A workaround is to apply the '-speeds dsl' (or "dsl" -> "lan" or "modem") to bypass the measurement and the problem. (BTW the speed estimate is really not that crucial to performance, it just gives some hints to x11vnc for the wireframing, etc) Please verify that this workaround actually works for you. I have uploaded to my site a new x11vnc-0.9.4.tar.gz tarball that puts in some guards against clients disconnecting during this period. It should be much improved. I would appreciate you trying it out and letting me know how it went. Thanks, Karl -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]