Some further string-hunting in the Quartz Composer framework has revealed an interesting value:
It looks like Quartz Composer is reading a value with this key from the global user defaults repository.
In fact, enabling it by bringing up Terminal and typing
defaults write -g QCShowPrivatePatchSettings 1
causes Quartz Composer to present some additional options for well-known patches.
Please see kineme.net for Leopard-specific informations.
“Billboard” now includes “Force Pixel Alignment” and “Ignore Rendering Destination Pixel Aspect Ratio“ checkboxes:
And “Image With Movie” now includes “Mask Compatibility” and “Deinterlace Fields“ checkboxes: