setAttributeNS(nsuri, name, value) takes a qname, not a localname as its 2nd argument. (This is not to be confused with getAttributeNS(nsuri, name), which takes a localname as its 2nd argument.)
git-svn-id: http://svg-edit.googlecode.com/svn/trunk@1410 eee81c28-f429-11dd-99c0-75d572ba1ddd