I built my own theme, and when I go into the different resources, like File or Folder the YUI libraries needed aren't being called. Down by the "Select Files" label the icon just spins and doesn't give the option to enter the file browser. Same thing happens with the Upload a File assignment. In the Question Bank, the "Choose a question type to add" popup instead loads inline on the page.
These can all be traced back to the YUI libraries not loading up in my <head>. It works perfectly fine if I switch back to a different theme. Is there anything special I need to do to make this happen?