A few reported bug were fixed:

*Hexa's song and cutscene was not always triggered after beating the 3rd arcade before going into act 4.

*Drop bash on lava or missile launcher didn't stop the bash.

*You could wall jump while drop bashing.

*Ants in act 3 got stuck in the ground on some occasions.

*Hitting the lava could sometime cause more than 1 hit point.