If, in attempting to create category archive templates in Movable Type, you find that your lists of categories themselves are not appearing on aforementioned category archive pages despite using the VERY SAME CODE, do not fear!

A quick Googling will lead you to the conclusion that you must use PHP includes, or that you are doomed forever.

Poop on that, you say. I don't want to change my filetypes just to make category listings work.

Hey, you're my kind of template coder. As such, I offer you a tip gleaned only from a long Googling: Simply replace all instances of <MTSubCategories> with <MTTopLevelCategories>.