Should check that your passwords match as soon as you blur the confirmed password.
When changing the default browse classification, the filter box (just under it) should automatically be checked if a hierarchy is selected and unchecked if it's empty ("-- always use default --").
"Do you want to be a milliona curator" should show the "Curator Information" section when checked. It does not get hidden when you uncheck it, though. Note you must NOT be a curator already for this to work.
"Learn more about browse classification and filtering" should show a block of text (no way to hide it).