http://bugs.winehq.org/show_bug.cgi?id=28937
--- Comment #10 from Nikolay Sivov bunglehead@gmail.com 2011-11-02 22:00:26 CDT --- Next issue with it will be fixed with a patch I sent yesterday - http://www.winehq.org/pipermail/wine-patches/2011-November/108468.html.
After it IXMLDOMattribute is accessible for IDispatchEx and 'value' property returned properly. Application still fails though, needs more debugging.