Bukkit

Wolves and tame dogs can now damage wild animals, same as vanilla. Any animals on claimed land, however, are protected. They can only be damaged by the claim owner or someone else with /containertrust in that claim.

The "you are immune to pvp" and "you are no longer immune to pvp" messages will no longer display when PvP is turned off.

When you use a string, it will now tell you only about the block you used it on. So now players can tell how deep a claim goes by experimenting with a piece of string. Also, using a piece of string on an unclaimed block will remove any visualization you're currently viewing.