Configuration files are now fully functional, although the format has changed (old format config files will automatically update to the new format). See the sample config.yml on GitHub for more info.
Reloading config file while in-game is now fixed
Damage values for blocks (e.g. orange wool) now works using '@' in the config file
Many fixes to spawn-blocking (squid, villagers, golems, snowmen, spawner eggs, etc)