What is this small 16X9 box after export?

[NC17z]

Can someone tell me what this small 16X9 OFF Pixel Box is in the center of theses screen grabs?
It appears in Microsoft DV AVI Export of mine. In dark lit areas of the video it is pretty evident that its there.

Shot with 24PA Squeeze Mode.
Import PP2
Magic Bullet 2 Aged Look
Export DV AVI Export
I have EVGA 7800 GTX Video Card
Dual Core 3.0 with 2Gig Ram

 

[Sad Max]

looks like some kind of disembodied spirit trying to come through.