I can't make a getJSON request WHEN i use the jquery.validate.min.js plugin

Look for yourself on this playground site I made: Dead Link

Anyone got an idea how I can still use jquery validate plugin BUT also make the getJSON request work?

Thanks for any help!

P.S.

This is the problem I discovered during this discussion:  http://forum.jquery.com/topic/getjson-problem

The code on the playground site is the code DmitriiP provided.