Inventory System Broken - Can't Acquire New Items

[panwaffle36]

I'd need to play for longer to ascertain the exact nature of this bug, but it seems that in my current TiTS playthrough, ever since my inventory filled for the first time, every single new item I pick up turns into the last item I picked up on the "Drop" screen, including equipment like the sword that Dane drops upon defeating him. Perhaps related is the fact that I can't put up any decorations on the ship despite having two posters in my inventory (supposedly). I would have checked to see if anyone else has posted about this bug before, but I didn't want to risk spoilers. Thank you!

 

[Theron]

Perhaps related is the fact that I can't put up any decorations on the ship despite having two posters in my inventory (supposedly).

Did you 'use' the posters from your inventory?
Have you been using the storage on your Ship?

 

[Gedan]

Inventory stuff is working fine across a bunch of my test saves; if you post one of yours exhibiting the problem and I can look into it in greater detail.