This is a bug fix to address the following issues:

1.  Some players didn't realize they could open doors. 
2.  Some players didn't know they could destroy crates with melee attacks. 
3.  Some players didn't realize the need to climb in two areas.

It is a serious fix because it prevented some players from being able to progress beyond the first few minutes of the game, and constitutes:

1.  A simple pop-up dialog in one area (the first house).
2.  Simple widget popups when near interactable doors and ledges.