Some skill bugs and issues I have found.

#1 - Feb. 28, 2012, 5:12 p.m.
Blizzard Post
Wizard:
Ray of Frost's last rune is called Black Ice, and so does his level 20 passive. See it here: http://us.battle.net/d3/en/calculator/wizard#c!W!c

Energy Twister's rune, Storm Chaser's tooltip is "Signature Spells are: Magic Missile, Shock Pulse, Spectral Blade, Electrocute".

Demon Hunter:
Both Vault and Tactical Advantage have the same icon, even though it's inverted.
While this might be done on purpose some people find it awkward.
See it here: http://us.battle.net/d3/en/calculator/demon-hunter#V!a

Witch Doctor:
Haunt lacks sustained damage compared to other "main" skills, like poison dart or fire bomb, and thus the spell should be replaced with another "main" skill, such as Spirit Barrage.

Barbarian:
Frenzy's stacks and skill icon are the same as the "+25% attack speed and 25% critical chance" shrine. Not only that but those are also the same as Unforgiving.
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Quality Assurance
#2 - Feb. 28, 2012, 5:58 p.m.
Blizzard Post
One bug per thread please :)

http://us.battle.net/d3/en/forum/topic/3123035732