A player's speed won't be set if there's no need to do so. This provides (limited) compatibility with other plugins that set a player's speed directly (player.setWalkSpeed) instead of via potion effects. (As such, the repeating task that sets player speed is now split into a task for each player, instead of one task that checks all players.)
Damage modifier event handler priority has been changed from MONITOR to HIGHEST. This is also to provide compatibility with other plugins that would like to get the true final damage dealt to a player due to environmental causes.
#47: Don't send a message if the corresponding messages.yml node is empty/null. Allows for messages to be completely disabled while in chat mode, since they don't seem to respect the category "enabled" node I guess