Flash Player will display anything on the stage, unless embedded into HTML (which basically just visually crops FP) or movie clips masked off. So if you enlarge the Flash Player window after test movie, you will see more than what is strictly within the stage bounds.
i guess my prob is, my test swf just opens in a new Flash tab, same size as the Flash drawing board area
my banner is only 150 px tall, and i can't even minimize the flash window that short, plus it's a pain to have resize your flash window everytime you want to view a properly 'cropped' preview
can i set test movie to automatically open in a new correctly-sized window? i understand the swf will ultimately be viewed on a browser-sized html page, but doesn't the stage crop out everything in the grey when you publish it??
In preferences, you can change how test movie opens.