Just noticed that on the vocab page, the big buttons seem to have different interactions - the "Queue" button makes the bag move down a bit on mouse-over, pretty nice looking, but doesn't affect the text, the "Chinesepod" moves the whole thing up a bit, including the text (seems a little inconsistent), and the other two don't seem to do anything.
I would vote for a queue type response for all 4, if possible, but consistency no matter what.
(ff 3.6 btw)