ie9: Unable to set value of the property 'dir': object is null or undefined

just implemented a first version of CKEditor, and it is AWESOME. 

the only issue so far, is that it blows up on load in ie9

here's my startup code 

<textarea cols="100" id="editor1" name="editor1" rows="10"><b>some html.....</b></textarea>

CKEDITOR.disableAutoInline = true;
var editorSaveButtons = {};
permal.onLoaderClosed = function() {
$.each( $('.ckeditable'), function(i,v) {
    CKEDITOR.inline(v); 
});
};

the error happens on this line within ckeditor.js

function(){this[a].dir=this.rtl[a]?"rtl":"ltr";

it works great in ie10, Firefox