Okay, I know I'm killin everyone but ....
I have no idea what's going on or what button (i.e. HOTKEY) that I hit, but if I select any object and then vertex and then select some vertex's and move them ... it's like a have a copy of the object underneath ... it's really weird.
I have a rectangle with a square cut out and when I select vertex and move them the original geometry sits where it is and then if I move the points I have the new geometry - hole created by the move and the old geometry hole underneath it .... I am lost ... although I am sure this could be VERY handy in some situations.
Oh yeah, it's 5:00 in the morning and I really am not dillusional .... just on a roll and without care ... well except for the old geometry sting around >>>>