Fun tip for those who've just installed the Movable Type software: write your first entry (your new weblog won't exist until you do!), spend half a day modifying the main index template (clicking the "save and rebuild" button zillions of times), then go back and modify the original entry. Ta-daaa! The template has automatically reverted to the default, destroying all your "saved" work! (The secret: you have to turn off a global setting that is "on" by default in order to instruct MT not to revert changes to the template when a new entry is posted.)
Wasn't the whole point of busting my balls with CSS supposed to be the total permanent separation of layout and content? Until now I had politely rejected that whole "CSS was created because anyone can write HTML and web developers were afraid of going the way of typists" conspiracy theory.