fr:select1-button

Hi! I can't get this to work:
http://wiki.orbeon.com/forms/doc/developer-guide/xbl-components/select1-button

Can anyone confirm that it's working as it's supposed to in orbeon 3.8?

<fr:select1-button ref="instance('questionnaire-instance')/TESTVALUE">
    <xforms:itemset nodeset="instance('stock-language-instance-1')//item">
     <xforms:label ref="label"/>
     <xforms:value ref="text"/>
   </xforms:itemset>
</fr:select1-button>

In my application, I confirmed that I had the item-set source to a working path by changing it to a regular xforms:select1 control. Can anyone spot what I'm doing wrong?

Forgot to add that by "not working" I meant that it doesn't appear at all. A regular xforms select1 control is fine with the same nodeset source.

I just downloaded the nightly build (today is June 28) and found that it appears to have been fixed. Never mind!