Just ran into an interesting bug - I was playing as a halfling monk, and all my non-potion slots were full when I wanted to buy an item to convert, so I converted the rest of my mana potions, bought the item, and converted it. The potion fell to the floor, as it probably should have, but when I picked it up my character teleported to the bottom left corner of the screen, and I could no longer move him by clicking anywhere and was forced to reload.
