The version number. This is widely considered one of the final stability and balance patches for the game, as Vanillaware has stated they have "no plans" for major future DLC or sequels.
Specific combat bugs were addressed, such as an issue where the Shining Light skill's Blindness effect didn't always trigger correctly for cleansers like Clerics or Elven Archers.
The game now clearly displays the number of stat-boosting items (like Dew of Illusion or Miracle Fruit) used on each character. For example, characters who have hit their limit will show a "5/5" indicator, making unit optimization much simpler.