Two big announcements. First of all the game was updated to version 1.2.9 with the following bug-fixes/improvements:

• disables characters personal quests in chapter 4, preventing players from being stuck (you must do them before chapter 4)
• should also prevent the "grid not full" crash that a few users are experiencing (replaced the grid UI completely so that should fix it! )
• adjusted vertical alignment of actions so the "use item" icon is visible even if you have learned all the skills of the Thief class
• some other minor bug-fixes

Also, now you can get the Bonus Content (Wallpapers+OST) on Steam too:
http://store.steampowered.com/app/275240

and in the store game page you can now buy base game + DLC + bonus all at once in the "Deluxe version":
http://store.steampowered.com/app/257970/