I've just beaten the second major boss and was given a key item. Unfortunately, when I try to equip the key item, all it does is move my character. This meant that I was stuck in the post-boss room and meant that I had to quit without saving, and will have to beat the boss again.
However, this is not the only item which I could not use. I could not use a sword called Besswarr, and could not use the black onyx either. Again, when I tried to equip them, all it would do is make the character move.
Another annoying issue is the fact that I am unable to get into the skills / spells tab unless I am talking to a shopkeeper, but since I end up back at the hub so frequently it has only been a minor hindrance.
Hopefully my first concern will be addressed soon because I cannot progress any further unless it is.