401993-1.xml
<bindings xmlns="http://www.mozilla.org/xbl"><binding id="foo"><content><span xmlns="http://www.w3.org/1999/xhtml"><children xmlns="http://www.mozilla.org/xbl"/></span></content></binding></bindings>
<bindings xmlns="http://www.mozilla.org/xbl"><binding id="foo"><content><span xmlns="http://www.w3.org/1999/xhtml"><children xmlns="http://www.mozilla.org/xbl"/></span></content></binding></bindings>