I'm not sure how to report a typo, surely it isn't [BUG], not [SUGGESTION] either so I'm just gonna make it here as a feedback. Also, this could be entirely correct wording, in which case I'm wrong and pls disregard this feedback. However the description of the talent "Elemental Mastery" in Elemental tree reads:

"When activated, your next Lightning Bolt, Chain Lightning or Lava Burst spell becomes an instant cast spell. In addition, your Fire, Frost, and Nature damage spells a 15% increased critical strike chance for 15 sec. Elemental Mastery shares a cooldown with Nature's Swiftness."

Screenshot provided:
http://img217.imageshack.us/my.php?image=elementalmasterytypo.jpg

The 2nd sentence, the way I read it, should have been:

"In addition, your Fire, Frost, and Nature damage spells GAIN a 15% increased critical strike chance for 15 sec."

The current version was missing a verb. I can't really say what Blizzard wants that verb to be, but I guess it should be "Gain". I understand this is a trivial matter and typos can be very easily overlooked, if it could be corrected, it should.

Sorry if this post isn't in perfect English :P Thank you very much !