Object [Object Object] has no method stringify
After so many edits, and awesome comments, i figured it out. I was using the wrong path in the preloader, which is why stringify failed, it wasn't finding any object whatsoever.Then, with the interpreted but transferred as error, it was because in my HKEY_CLASSES_ROOT\.js (regedit) the content type was set to text/html. Setting it to application/javascript fully fixed my problem. Thanks a ton for everyones help!
I had a similar problem. The root of this error can be from a bug in Mootools. Mootools before version 1.3.2 will override JSON object. You have to use a newer version of Mootools to solve the JSON.parse and JSON.stringify problem.