problems with xml returned when invoking a web service with CF11

hi, i have run into an unusual behavior when invoking web services.

i am calling a web service that returns an XML like this:

<children>

     <child>

          <firstname>john</firstname>

          <lastname>doe</lastname>

     </child>

</children>

when invoking this web service from CF10, it works just fine. However, when invoking from CF11, i only get this:

<child>

      <firstname>john</firstname>

      <lastname>doe</lastname>

</child>

no <children>? for some reason, CF11 ignores/hides the topmost XML level. this doesn't happen on previous versions. why? the server that hosts the web service is CF11 too.