QuickTime :: Player Seem To Enlarge Smaller Movies To ~480 Pixels Wide On Playback?

QuickTime Player (we have version 10.1) seems to play movies at a minimum movie size of 480 pixels wide. Smaller movies (say 80, 200, etc. pixels wide) get enlarged to 480 pixels wide when played, making them blurry. Movie Inspector confirms the original size of these movies (of various formats) and that the current player window size is 480 pixels wide. They can't be viewed any smaller (either by the window resize handle or from the View menu).We frequently make moves from slices through small sub-volumes of 3D reconstructions and it doesn't seem that this latest version of QuickTime Player can be used to view these small-sized movies any longer. Am I missing a preference or checkbox somewhere in QuickTime Player?