IE9 CKEditor 3.6.2 Javascript exception

[Andy]

On opening a page in an iFrame that contains the CKEditor 3.6.2 I get the following exception
SCRIPT5007: Unable to get value of the property 'getElementsByTagName': object is null or undefined ckeditor_source.js, line 8 character 187

IE Debugger stops at if(!d){var e=document.getElementsByTagName('scrip');

Javascript debugger in ckeditor_source.js

In the following code:
Compressed version of core/ckeditor_base.js. See original for instructions. /*jsl:ignore*/

if(!window.CKEDITOR)window.CKEDITOR=(function(){var a={timestamp:,version:'3.6.2',revision:'7275',_:{},status:'unloaded',basePath:(function(){var d=window.CKEDITOR_BASEPATH

;if(!d){var e=document.getElementsByTagName('script');for(var f=0;f<e.length;f++){var g=e[f].src.match(/(|.*[ \/])ckeditor(?:_basic)?(?:_source)?.js(?:\?.*)?$/i);if(g){d=g[1];break;}}}if(d.indexOf(':/')==-1)if(d.indexOf('/')===0)d=location.href.match(/.*?:\/\/[\/]*/)[0]+d;else d=location.href.match(/[\?]*\/(?:)/)[0]+d;return d;})(),getUrl:function(d){if(d.indexOf(':/')==-1&&d.indexOf('/')!==0)d=this.basePath+d;if(this.timestamp&&d.charAt(d.length-1)!='/')d+=(d.indexOf('?')>=0?'&':'?')+('t=')+this.timestamp;return d;}},b=window.CKEDITOR_GETURL;if(b){var c=a.getUrl;a.getUrl=function(d){return b.call(a,d)

c.call(a,d);};}return a;})();

/*jsl:end*/

[Andy]

Note: Using IE9 on Windows 7.

[Jakub Ś]

Could you sned us reduced test case file (sample html page) showing the problem?