UnrealIRCd 6.2.4 comes with optional multiline support (not loaded by default yet), a lot of new conditional config and crule functions, and a new GeoIP engine. A bug has been fixed that could confuse services with +e/+I extbans and a Windows crash bug has been resolved.
All the information can be found in the release notes.
As always, you can download UnrealIRCd from www.unrealircd.org. If you want to upgrade on *NIX, then use: ./unrealircd upgrade