http://dayzmod.com/forum/showthread.php?tid=17398

Build Notes

HOTFIX : 19 JUNE 2012

Affected addons:
* dayz_code 1.7.1.5
* dayz_equip 1.3.3
* dayz_weapons 1.3.2

Developer's Note:
* A designation of [NEW] doesn't necessarily mean a new feature, 4chan, it means a change in operation not directly related to a bug. Could be for better performance or rebalancing.

Changelog:
* [NEW] Infected raycast for line-of-sight less often (improves performance)
* [FIXED] Infected can see through terrain ( https://dev-heaven.net/issues/33787 )
* [FIXED] Raycasting being taken from wrong body position (ensured it is from eye level)
* [FIXED] Infected sometimes spawn close to a player (previous check once, now up to ten times)
* [NEW] Infected bodies will despawn after 5 minutes of their death (improves performance)
* [FIXED] Sometimes infected will stand still after loosing line-of-sight ( https://dev-heaven.net/issues/33715 )
* [FIXED] Can dupe tent's by right clicking (forgot to close the window)
* [FIXED] Poor performance caused by infected search behavior (MAJOR performance increase during closed testing)
* [FIXED] Audibility is far to high (completely rebalanced, in line with how it was in previous updates)
* [FIXED] Can dupe food during cooking if click really fast (now you cannot)
* [FIXED] Trying to pick up a hatchet would create fake ammo (now will not)
* [FIXED] Hatchet takes up too much room (can now be transferred between toolbelt and primary slot through gear action)
* [REVERT] Hatchet now collected as an Item (toolbelt) and can be equipped to primary (gear action)
* [NEW] Flashlights can now be packed to toolbelt also (gear action)
* [NEW] New players will spawn with flashlight added to their toolbelt not backpack
* [FIXED] Infected sometimes not inspecting thrown items (they will walk to the location of a noise, 20-40m away)
* [FIXED] Unlimited Infected spawning (now has a cooldown enabled so it won't spawn too many at once)
* [FIXED] Melee weapon sounds non-existent/terrible (now has placeholder sounds)

Really likeing the Hatchet/Flashlight 'tool belt' action.

And there was a nerf to Zombie's hearing and other detection things.