[Users] Problem with redlining in IE8

[Sascha Müller]

Hi all,

I want to use the ux Redlining in my application.
It works fine exept for reload the page. This error appears only in the IE8.

The same happens in the example: 
http://dev.geoext.org/sandbox/redlining/ux/FeatureEditing/examples/ControlerOnlyExample.html

Is there something I have to Do to avoid the error?

Thanks

Sascha