As the thread states, when I updated to 1.04 after I un-equip an item I can't equip it back. I can't even equip other items in that slot. Sometimes I can go back in and out of the inventory and it will work. Other times I have to re-load a save and it works. I never had this issue with version 1.02. I can't help but think that the patch had something to do with it.