[jQuery] JSON array size different in IE than in FF

[jquertil]

I'm at the end of my rope and REALLY hope someone knows how to address
this:

got some JSON like so:

var Data= {
   Music :
   [
      {"Band":"The Beatles","Title":"Hey Jude"},
      {"Band":"The Beatles","Title":"Help!"},
   ]
}

And I'm simply looping over it like so:

$(Data.Music).each(function(i){
   alert( Data.Music.length);
});


in FF all is well, but in IE I get 2 alerts and a fatal error ("null
or not an object") because the length is 3, not 2!

I wish I had any clue what's going on. How can I fix this?

Thanks!!!