The link is talking about the WOTLK Totem of wrath. The current totem of wrath is 3% crit and hit. They are changing it to 3% crit and 6% increase spell damage.

Because the buff is raid wide, I am going to assume that they are changing it so that it does not stack. This is of course an assumption, because a % spell damage increase buff being stackable raidwide is stupid and imba. They will change it to either raid wide non stack or stackable party only.

Will most likely be raid wide unstackable.