I tried to use the cascading dropdowns script to filter a "sub-type" drop-down, using the Content Type (which appears as a drop-down list in the edit form) as parent, but it did not work. Unless I just set somethign up wrong, I am guessing it doesn't work with the Content Type drop-down because it has different markup from a normal drop-down control. Is this correct? Is there any way ot make this functionality work with a content type drop-down? I have run into this requirement time and time again - users want multiple content types with distiinct metadata in the same document library. They want a "sub-type" lookup of choices that vary by main type. If I create a separate site column for each content type's subtypes, it complicates the views, and these site columns also all need unique names, which makes it even uglier. It would be really nice to be able to filter the sub-types by content type.