Internet Explorer 8 JavaScript error

[gman]

I receive the following type of errors in IE8:

Webpage error details

Message: 'this.getOwnerTree()' is null or not an object
Line: 102
Char: 2338
Code: 0
URI: http://test.commerce.wi.gov/php/fengoffice/public/assets/javascript/extjs/ext-all.js

Is this a bug with the JavaScript code or an IE 8 issue.

[cabeza]

It looks like an Etxjs error.
We'll look at it.