in the 436 build:
if you right click an address and choose new filter then choose file into folder, the buttons and fields get rendered outside the dialog and become unusable. You kind of have to see it to know what I mean.
when you try to save a new mail filter created in the above fashion, it errors with "something is wrong with your values".
when you click new filter from the "mail filters" tab, the UI freezes in both firefox and IE