Running the following simple program and moving the mouse on and off the sphere causes the sphere to eventually vanish!
from visual import *
while 1: p = scene.mouse.pick
Curiouser and curiouser. I cannot reproduce this on my home computer, and I don't see any obvious problems in the code. Could this be a driver-specific or Win2K-specific problem?
I am downgrading the severity to 5, since it seems to be a localized problem. I'll try to look at it more closely at work on Monday.
Feb. 2001 cannot reproduce. Maybe something was fixed along the way?