LV,
Don't worry about this artifact too much, I'm just chalking it up to an old Gal Friend of mine from Perth blowing her stack when I got in from that patrol....She was a right strange Sheila that one, Pretty but a bit off if you know what I mean.
It's not really a big deal and it could be my ATI card, nevertheless it didn't last long anyway.
Take care and Thanks for checking into it for me.