Flash Changes your document size

Is anyone aware that in the attempt to get rid of the context menu in flash (the bar up top that says file, view, control, help) by using:

import flash.ui.ContextMenu;
stage.showDefaultContextMenu = false;

it adds 10 pixels to the top and 10 pixels to the bottom of your document size WHEN PUBLISHED. It does this in both the published EXE file and SWF. I’m kinda perturbed about Flash changing my document size on its own.
Anyone else notice this?