soapui 3.6 beta 2 XmlHolder bug??

Hi.

I have an XmlHolder object that does not seem to be executing my XPath correctly.

Calling

returnHolder.getPrettyXml()

yields

<result>
   <length>1</length>
   <event intEvtFrnAccId="19" dteEvtDateCreated="2010-08-20 02:41:48" bitEvtIsActive="1" dteEvtDateModified="2010-08-20 13:46:00.546" evtEncodedId="0x70120001">
      <txtEvtStatus readonly="true"/>
      <dteEvtDateClosed readonly="true"/>
      <txtEvtLocation readonly="true"/>
      <intEvtNumberComplete readonly="true"/>
      <intEvtNumberIncomplete readonly="true"/>
      <intEvtNumberRegistered readonly="true"/>
      <bitEvtIsTest>0</bitEvtIsTest>
      <dteEvtEndDate>2010-08-28 14:41:46</dteEvtEndDate>
      <dteEvtStartDate>2010-08-21 14:41:46</dteEvtStartDate>
      <dteEvtTrvArrDate/>
      <dteEvtTrvDepDate/>
      <intEvtFrnTimeZoneId/>
      <txtEvtAnsField01/>
      <txtEvtAnsField02/>
      <txtEvtAnsField03/>
      <txtEvtAnsField04/>
      <txtEvtAnsField05/>
      <txtEvtCode>APITest100820144139698</txtEvtCode>
      <txtEvtExternalFrnKey/>
      <txtEvtGoogleAnalyticsToken/>
      <txtEvtName>api test event 100820144139698</txtEvtName>
      <txtEvtNotes/>
   </event>
</result>

But calling

returnHolder.getNodeValue("//event");

yields null. I have tested the script in standard Groovy and it evaluates correctly. Am I missing something here?