- fixed issue on "IE10 windows 8 VM" (it had different behaviour from "IE10 preview on my windows 7 machine" :S ...)
- to summarize IE compatibility: i have succesfuly tested it on "IE9-win7", "IE10-preview-win7", "IE10-win8-VM", and of course every other normal browser on win7
- for more details on the issue: http://blogs.msdn.com/b/ie/archive/2012/07/19/xmlhttprequest-responsexml-in-ie10-release-preview.aspx