HtmlCleaner seems to not knowing the tag, and it drop it when it is told to drop unknown tags. I have checked the following with the command line of htmlcleaner:
Therefore:
test
content
became using java -jar htmlcleaner-2.1.jar src=(above sample in a file) omitunknowntags=true
2009-10-02 12:11:22 UTC in HtmlCleaner
