UpdateProcessor not working with DIH, but works with SolrJ

[Shawn Heisey]

I have an updateProcessor defined.  It seems to work perfectly when I 
index with SolrJ, but when I use DIH (which I do for a full index 
rebuild), it doesn't work.  This is the case with both Solr 4.4 and Solr 
4.5-SNAPSHOT, svn revision 1516342.

Here's a solrconfig.xml excerpt:
<updateRequestProcessorChain name="nohtml">
  <!-- First pass converts entities and strips html. -->
  <processor class="solr.HTMLStripFieldUpdateProcessorFactory">
    <str name="fieldName">ft_text</str>
    <str name="fieldName">ft_subject</str>
    <str name="fieldName">keywords</str>
    <str name="fieldName">text_preview</str>
  </processor>
  <!-- Second pass fixes dually-encoded stuff. -->
  <processor class="solr.HTMLStripFieldUpdateProcessorFactory">
    <str name="fieldName">ft_text</str>
    <str name="fieldName">ft_subject</str>
    <str name="fieldName">keywords</str>
    <str name="fieldName">text_preview</str>
  </processor>
  <processor class="solr.LogUpdateProcessorFactory" />
  <processor class="solr.RunUpdateProcessorFactory" />
</updateRequestProcessorChain>

  <requestHandler name="/update" class="solr.UpdateRequestHandler">
    <lst name="defaults">
      <str name="update.chain">nohtml</str>
    </lst>
  </requestHandler>

If I turn on DEBUG logging for FieldMutatingUpdateProcessorFactory, I 
see "replace value" debugs, but the contents of the index are only 
changed if the update happens with SolrJ, not with DIH.

A side issue.  FieldMutatingUpdateProcessorFactory has the following 
line in it, at about line 72:

        if (destVal != srcVal) {

Shouldn't this be the following?

        if (destVal.equals(srcVal)) {

Thanks,
Shawn