What's new in 2.4.0.2
1. What's new in Azureus 2.4.0.2

1.1 Faster Crash Recovery
By default Azureus will now only check parts of the file that were being actively downloaded the last time resume data was saved. The old behaviour of rechecking the whole file can be re-enabled via 'Files' configuration.

1.2 Bug fixes and performance improvements
Notable fixes:
  • Occassionally encrypted connections would send invalid data
  • Startup error 'no class found' fixed.
  • Data transfer to slow peers improved.

Note: New Windows launcher might require allowing "Azureus.exe" Internet access in your software firewall.

2. Full ChangeLog
http://azureus.sourceforge.net/changelog.php?version=2.4.0.2