Here are the updates which have been confrimed as part of DayZ update 0.48 as well as those which have yet to be verified and bugs which have cropped up as a result of the patch.
The list comes from Reddit user alaskafish and it's worth checking out the links for additional updates to the unofficial changelog as new details become apparent.
Confirmed:
- [Mechanic] Wall Glitching worked on – Before, After
- [Mechanic] Hardcore renamed to Firstperson, Regular renamed to Thirdperson
- [Visual] New Texture for Epinephrine
- [Gear] Crossbow Holosight, ADS, ADS Broken, Scope Ruined, On Crossbow 1, On Crossbow 2, Second,
Unconfirmed:
- [Spawns] Handguns and Handgun Magazines spawning inside Civilian Spawn Points
- [Gear] SMERSH vest
- [Spawns]Improvised Courier Bag Spawns in Civilian Spawn Points
- [Gear] Scope for CR-527
- [Gear] Suppressor for AK-101
- [Engine] Performance increased (Cannot be verified)
Bugs:
- Melee is broken (Better than last Experimental patch).
- If you try to lean (left or right) in the crouch position, your character will stand up.
- Containers on the ground do not show their contents until you pick them up after restart.