The formatting of a nice message for this event hasn't been implemented yet, so 
I'll just put an XML dump of the event here.

<ns:fieldTypeUpdated xmlns:ns="http://outerx.org/daisy/1.0";>
  <ns:oldFieldType>
    <ns:fieldType id="20" lastModified="2006-03-03T15:16:10.000Z" 
lastModifier="123" name="CocoonBlock" valueType="string" deprecated="false" 
aclAllowed="false" multiValue="false" updateCount="1" size="0" 
allowFreeEntry="false">
      <ns:labels/>
      <ns:descriptions/>
      <ns:selectionList>
        <ns:staticSelectionList>
          <ns:listItem>
            <ns:labels/>
            <ns:string>core</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>authentication</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>databases</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>forms</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>portal</ns:string>
          </ns:listItem>
        </ns:staticSelectionList>
      </ns:selectionList>
    </ns:fieldType>
  </ns:oldFieldType>
  <ns:newFieldType>
    <ns:fieldType id="20" lastModified="2006-03-03T16:00:23.607Z" 
lastModifier="123" name="CocoonBlock" valueType="string" deprecated="false" 
aclAllowed="false" multiValue="false" updateCount="2" size="0" 
allowFreeEntry="false">
      <ns:labels/>
      <ns:descriptions/>
      <ns:selectionList>
        <ns:staticSelectionList>
          <ns:listItem>
            <ns:labels/>
            <ns:string>core</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>ajax</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>apples</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>asciiart</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>authentication-fw</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>axis</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>batik</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>bsf</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>captcha</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>chaperon</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>cron</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>databases</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>deli</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>eventcache</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>faces</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>fop</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>forms</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>hsqldb</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>html</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>imageop</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>itext</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>javaflow</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>jcr</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>jfor</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>jms</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>jsp</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>linkrewriter</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>linotype</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>lucene</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>mail</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>midi</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>naming</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>ojb</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>paranoid</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>petstore</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>php</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>poi</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>portal-fw</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>profiler</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>proxy</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>python</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>qdoc</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>querybean</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>repository</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>serializers</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>session-fw</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>slide</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>slop</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>stx</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>swf</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>taglib</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>tour</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>validation</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>velocity</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>web3</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>webdav</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>xmldb</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>xsltal</ns:string>
          </ns:listItem>
          <ns:listItem>
            <ns:labels/>
            <ns:string>xsp</ns:string>
          </ns:listItem>
        </ns:staticSelectionList>
      </ns:selectionList>
    </ns:fieldType>
  </ns:newFieldType>
</ns:fieldTypeUpdated>