I am playing prerelease 10 with a gnomish bard. I reached the Griffyard and attempted to dispatch or at least damage Griff with a blessed potion of ultra healing, only to find it did absolutely nothing. Blessed water damages undead, healing spells damage undead, and mixing them both together doesn't. At the very least this is highly counter-intuitive. ~350 damage for a blessed potion of ultra healing would be somewhat overpowered considering the low HP totals of powerful undead, but at least a fraction would be nice.