XTF 2.1 is now available. This release contains bug fixes and stability improvements.
For a full listing of the changes, see http://xtf.wiki.sourceforge.net/changeLog_2.1.1
As always, backward compatibility has been a high priority. The only change notable in this regard is that dynaXML will no longer by default create lazy trees by itself, instead relying on textIndexer to create them. However, if you depend on dynaXML alone to do this, there is a new configuration option to turn this on.
Note that you can upgrade the core of XTF, without the stylesheets, by downloading xtf-core-2.1.1.zip, instead of xtf-2.1.1.war.