For whatever reason...
I seem to get a much better VNC experience (serving on a Windows box) if my VNC client is on my Mac, rather than my PC. Haven't done any experiments to find out why though - I wouldn't have thought changing clients would have made much difference. Both clients were on a 100Mbps network, the PC client was 700MHz whereas the Mac is 500. Maybe I'm just caught up in the Steve Jobs Reality Distortion Field...
On and on and on and on,
and on and on and on goes John.