The update is mostly about changing the game balance in the player's favor. Here's the full changelog from Mad Finger Games:
- Kamikadze - Decrease Damage done by explosion
- Infectator - Lowered aiming capability
- Berserker - Decrease HP
- ScientFist - Balanced radioactivity damage
- Zombies difficulty was rebalanced
- Several missions were rebalanced
- Inverted y-axis added
- Samsung S III and S IV crashes fixed
- Broken fonts fixed
- Produced chain-saw is visible in Inventory
- Inactive boosters is not visible anymore
- Pain-Killer upgrade works correctly
In our review, the difficulty of the special zombies was one of the major sticking points mentioned. You really had to use expensive consumables to survive these fights, but maybe now it'll be a bit easier. In general, the zombies should go down with fewer bullets now, which means less pressure on the player to dump real money into the game.
Update: We've reached out to the developer a few times to see what's up with the compatibility issues. We'll report back if we hear anything.
Update 2: It looks like the error has been fixed and Dead Trigger 2 should again show as compatible with your devices.