Si son tan amables de testear con sus repectivas clases si estas auras, si estan stackeando, son muchas y seria bueno si me pueden confirmar. Es un reporte de 6 meses de trinity queria saber aca como esta funcionando esto, tal ves rata lo fixeo pero por las dudas posteo.Ayudaria a balancear mas el daño pve/pvp. Algunos bug son viejos y se que se solucionaron, pero no conosco todas las clases para saber si el 100% esta fixeado.

Googling through closed and opened issues, all i could find were either uncomplete/inaccurate reports of this problem, or only a few spells being reported 1 by 1. Anyway i decided to make a complete list of buffs/debuffs which stack with similar or same buffs, though they shouldn't.
NOTE: ID's of following spells are showing their max ranks.

There is a problem with the spell "Deathwish" of Warrior and "Hysteria" of Death Knight.
First problem is that Hysteria and Deathwish are not supposed to stack but in reality they do.
Another problem is that the same person can get 2 or even more Hysterias on him and they stack while they are not supposed to.

Leader of the Pack[17007] stacks with Rampage[29801], which is 10% increased melee and ranged crit chance instead of 5%.

Totem of Wrath[57722], the spellpower buff this spell provides stacks with Demonic Pact[47240], giving huge amount of spellpower. Shouldn't.

Flametongue Totem[58656], the spellpower buff this spell provides stacks with Demonic Pact[47240].

Sanctified Retribution[31869] stacks with Arcane Empowerment[31583] again stacking with Ferocious Inspiration[34460], giving increased damage to party/raid members, calculated 1,03 x 1,03 x 1,03~1,927 which is 9,27% increase to damage done, instead of 3%. Lots of boost there. Furthermore, Sanctified Retribution stacks with itself, depending on how many different auras are retri paladins using, while having this talent.

Swift Retribution[53648] stacks with Improved Moonkin Form[48396], 6% haste instead of 3%. Also, just like Sanctified Retribution, Swift Retribution stacks with itself.

Greater Blessing of Kings[25898] stacks with Greater Blessing of Sanctuary[25899], well, stamina and strength parts stack and they shouldn't, adding 1,1 x 1,1=1,21; 21% to stamina/strength instead of 10% to both.

Crypt Fever[49632], which is actually a part of Ebon Plaguebringer[51161] stacks with itself(only the disease part stacks, 13% magic damage taken is fine). 2 unholy deathknights in a party/raid equals 1,3x1,3=1,69; 69% increased disease damage done, instead of regular 30%.Calculate yourself how much increase 10 UH dks in a raid would give.

That's all, rest of the buffs/debuffs arent bugged, example Mangle[48566] works fine when applied with Trauma[46857].
Importancy of these bugs is obviously large, as every TC based wotlk server has imbalanced raids, with cataclysm-ish numbers of damage due to these stacking issues.

Power infusion isn't supposed to stack with Heroism or Bloodlust.

Buff - Wowpedia - Your wiki guide to the World of Warcraft may help understanding the issue. List is for 3.0.2, but its basicly the same for 3.3.5, with a few added spells.

One thing that may help fixing this thing is 89bae3b It was used back when Curse of Elements/Earth and Moon/Ebon Plaguebringer were stacking. And most of the aforementioned spells stack in the same way.