I have this weird problem when I move a CS2 (Illustrator) file from my PB screen to the 20" ACD in the screen spanning mode. As soon as I move the open window (ie. opened Illustrator file) to the ACD, the window shrinks all of the sudden and only shows the top edge of the window frame. I cannot close it by clicking the red X button. I cannot move/resize the file by trying to grab the upper edge of the window, either. I am wondering if the other forum members are also having the similar problem. I run Tiger on my 12" PB.