My stage is 550 pixels. I draw a rectangle on the stage that is also 550 pixels. I turn the rectangle into a movie clip, click into the movie clip, and create a new layer. I then alt-click on the stage with the rectangle tool and create a rectangle that should be 512 pixels wide according to the rectangle settings dialogue box. I then switch to the selection tool and click on the second rectangle that I just made and the properties panel says that the width of the object is 379.9 pixels. It is indeed much smaller than a 512 pixel rectangle should be. Why am I getting a different sized object than what I indicated in the rectangle settings dialog box?