yui ext is lacking namespace awareness in at least the point discussed here:
http://www.yui-ext.com/forum/viewtop...?p=20247#20247

It seems to me that yui ext should add a namespace declaration somewhere prior to dealing with ext: attributes. Workaround is to manually declare ext namespace in html element, pointing to any url.
Since I'm not involved in development, could someone please fix this in yui ext, so this workaround is no longer necessary?