Back in May 2009, I created my first jQuery ticket: Use native JSON.parse if available inside ajax.httpData
In jQuery.ajax.httpData, would you consider using the native JSON support (http://www.json.org/js.html) if available? Below is some untested sample code. Maybe the (JSON && JSON.parse) check is better located under jQuery.support.JSON and could be expanded to check if JSON.parse is a function?
Today, it was fixed and closed by John himself.