I removed the `MOVE` callback completely. See the updated file: https://github.com/tilomitra/yui3/blob/dc8cd18ea736ccd5ec46447f308737fae194c9e7/src/event/js/tap.js

I figured that unless it was absolutely necessary, there's no point checking something in `MOVE` since it's fired so often. I took the logic in the `MOVE` callback and just moved it down to the `END` callback.