I'd like to share with you a interesting bug of IE, which was found while I am writing my own JSON implementation.

Only 20 lines javascript code cause IE 6 and IE 7 browser crash!

////////////Code start

callback = function(data)
{
 alert(data.Movements);
 document.body.removeChild(scriptNode);

}

loop = function()
{
 scriptNode = document.createElement("script");
 scriptNode.type = "text/javascript"
 scriptNode.src = "./crashie7.js";  //The crashie7.js file should contained a call to callback() function with json data)
 document.body.appendChild(scriptNode);

 setTimeout(loop, 700);
}

loop();
////////////Code End

It seems remove a script node while codes in it were executing will cause IE browser crash.

I also found a quick fix for that problem:

////////////Code start
callback = function(data)
{
 alert(data.Movements);

       //  A delay to remove the script node.
 setTimeout(function()
 {
  document.body.removeChild(scriptNode);
 }, 3000);
}
////////////Code End

Running above piece on you IE browser and have crash fun!