In JSPUI the system was forgiving with an instance with plain-old-HTML that users entered into the metadata values for fields. In XMLUI, it requires valid XHTML, otherwise it junks the whole text and displays the html in the page, as opposed to rendering them. This solves local needs, and had been a deal breaker before migrating between systems.
Therefore, I've implemented jTidy in DSpace to clean up collection and community metadata fields. It runs from the command line.
== To Install the JTidy JAR ==
Download the jar: http://sourceforge.net/projects/jtidy/files/JTidy/r938/jtidy-r938.jar/download
mvn install:install-file -Dfile=/home/dspace/Downloads/jtidy-r938/jtidy-r938.jar -DgroupId=jtidy -DartifactId=jtidy -Dversion=938 -Dpackaging=jar
Then it can be run from the command line:
/dspace/bin/dspace dsrun org.dspace.content.service.TidyService