Experience levels have changed in 1.8, so if you're trying to enchant something or use an anvil make sure to downgrade to 1.7.10 or some variant. Since we're using a protocol hack for 1.8 clients, things can get pretty buggy. Another example is being able to see the new blocks in creative mode, but not actually being able to obtain and place them, cause again, it's just a protocol hack. Hope this helps!
