If you’ve started using JDK 5.0 and are doing XSL transformations via Ant (e.g. for things like JUnit or Checkstyle reports), you may have problems. I had problems that manifested themselves like this:
cruisecontrol-2.2.1\work\checkout\sample\trunk\build.xml:239: javax.xml.transform.TransformerException: java.lang.RuntimeException: Unrecognized XSLTC extension 'org.apache.xalan.xslt.extensions.Redirect:write'
Which is of course because Java 5 ships with the XSLTC compiler. The easy fix is to change any instances of
xmlns:redirect="org.apache.xalan.xslt.extensions.Redirect
to
xmlns:redirect="http://xml.apache.org/xalan/redirect"
