Fast-resume info about torrents is now saved in other file than torrents.xml. It means that this file may be cleaner and no data are deleted from it (like torrent with bad metainfo file).
Latest version supports trackerless torrents via Azureus DHT. Don't expect new implementation of the DHT - you have to use AzDHT program. AzDHT is a modified version of Azureus. It has no UI and provides interface to DHT via local TCP server. See download section for JAR archive and sources.