Help! Limiting the published SWF's dimensions to those of the stage

I’ve run into a problem in the “Programming an RPG” tutorial from SeiferTim, but it’s a problem that affects all of my Flash use. In the tutorial, the author has you move a movieclip off the stage (-50, -50) in order to get rid of it, but when I publish the SWF and enlarge the display window, the graphic is hanging out at (-50, -50), which is visible.

My question is: is there any way to limit the boundaries of the published SWF to whatever the size of the stage is?