*bump*
I'm having the same issue. However, here's more detail.
Xvnc running on SuSE 9.1 Pro
Connecting machines
WinXP - vncviewer (v3.3.7): Opens a connection to the SuSE box and works as expected.
WinXP - vncviewer (v4.0): Opens a connection to the SuSE box, does not display anything. It leaves the vncviewer.exe task hanging out in the backend with a connection open to the SuSE box and it must be killed through the Task Manager.
FC2 - vncviewer (v4.0 release 1.beta4.11): Opens a connection to SuSE and xterm messages, "Server supports RFB protocol version 3.130". The next console message is, "Using RFB protocol version 3.7" d'oh! That looks like a problem.
Looks like we need to upgrade our SuSE 9.1 Pro VNC version! Too bad I can't via Yast.