1. In the final battle, my mage champion cast (3-turn) invulnerability. The SK promptly killed him on his turn with one of those deadly ranged round bubble thingies. (Or does the SK's spell trump invulnerability?)
2. When crafting an item, it sometimes deselects the item you're upgrading and replaces it with another item. Thus, some crafting supplies can get wasted if you're not paying attention because you can put the upgrade on the wrong item. (It puts the first upgrade on your item correctly, but even though there is another empty upgrade slot, it changes the item to be upgraded.)