Scripting QT7: Why doesn't this work?


Crotchety UI Nitpicker
I'm trying to make a simple script to adjust the size of a loaded movie in QuickTime Player. Seems simple enough:
tell application "QuickTime Player"
	set the dimensions of movie 1 to {640, 480}
	return the dimensions of movie 1
end tell
...but it doesn't seem to do anything. I can tell that the change is taking effect, because it returns the dimensions I specified. But the size of the movie in QTP doesn't actually change. I've also tried setting "the dimensions of track 1 of movie 1", but that doesn't work, either.

Is this just a bug, or am I going about it wrong? What does "dimensions" refer to if not the...well, dimensions?