(originally submitted via email by Raoul Sevier)
If you don't already know, when you run CotVNC,
minimize it to the dock, then expand it again, the
console goes nuts producing the following line at a
rate of 900 per second:
2003-01-23 06:50:38.634 Chicken of the VNC
Illegal tracking rectangle
This is most likely the mouse-moved handler going haywire.