Please someone link me to the open ticket in the bugtracker, I can't find it amongst the amount of bugs that are still open and unaddressed.
I just ran into this bug, and decided to make a video showing in detail each part of this bug. Watch it here:
https://www.youtube.com/watch?v=p73tt3d5pHc
My apologies for the occasional lag, video card has a hard time keeping up with both game and fraps I guess.
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How this quest should work
http://www.wowhead.com/quest=667/death- ... w#comments
The first comment is enough, taken from patch 1.12.2
"Three waves of Naga appear from behind the hill. One wave of three, one wave of two, and a final wave of three. They are all level 40."
"Right-clicking on this cannon while standing beside it will one-shot every Naga that appears in one fell swoop. Wait until the Naga are descending upon the defenders and fire. Every Naga will die instantly. After your three waves are done, collect your reward, matey!"
The mobs that should compose said waves, are the following ones:
http://wowwiki.wikia.com/wiki/Daggerspine_Marauder
(links to wow DB, thottbot and wowhead just below the text)
NPC number: 2775