New Manual Journal URL Field Not Working

request.xml

<ManualJournal>
  <Date>2011-12-31</Date>
  <Status>DRAFT</Status>
  <LineAmountTypes>Exclusive</LineAmountTypes>
  <UpdatedDateUTC>2008-09-12T05:04:00</UpdatedDateUTC>
  <ManualJournalID>f00a355b-7374-445c-886b-0437bea4095c</ManualJournalID>
  <Narration>Computer expenses incorrectly coded</Narration>
  <JournalLines>
    <JournalLine>
      <Description>Laptop to wrong expense account</Description>
      <TaxType>INPUT</TaxType>
      <LineAmount>-1085.0</LineAmount>
      <AccountCode>453</AccountCode>
      <Tracking>
        <TrackingCategory>
          <Name>Consultant</Name>
          <Option>Oliver Gray</Option>
          <TrackingCategoryID>093af706-c2aa-4d97-a4ce-2d205a017eac</TrackingCategoryID>
        </TrackingCategory>
      </Tracking>
    </JournalLine>
    <JournalLine>
      <Description>Laptop to correct expense account</Description>
      <TaxType>CAPEXINPUT</TaxType>
      <LineAmount>1085.0</LineAmount>
      <AccountCode>720</AccountCode>
      <Tracking>
        <TrackingCategory>
          <Name>Consultant</Name>
          <Option>Oliver Gray</Option>
          <TrackingCategoryID>093af706-c2aa-4d97-a4ce-2d205a017eac</TrackingCategoryID>
        </TrackingCategory>
      </Tracking>
    </JournalLine>
  </JournalLines>
  <URL>http://www.google.com</URL>
</ManualJournal>

response.xml

<ApiException xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <ErrorNumber>14</ErrorNumber>
  <Type>PostDataInvalidException</Type>
  <Message>The element 'URL' was not recognised. Ensure the element name has the correct case and that there are no duplicate elements of the same name.</Message>
</ApiException>