Using xpath returns arraylist instead of nodelist

I just moved code from grails 1.1 to grails 1.2.

I am parsing an XML structure similar to
<Items><Item>...</Item><Item>...</Item></Items>

My groovy code looks like
for (item in doc.Items.Item)

It used to be that doc.Items.Item returned a Node List and then the variable item got bound to each Item from xml.

Now the doc.Items.Item returns a one element ArrayList whose single element is the NodeList from before.
So now item gets bound to the entire Item NodeList.

This seems like a bug to me.