So before 4.2, when i played on my shaman healer (pve/pvp), i used an addon (dont know which one, thats the problem) that basically tracked the mana shield/earth shield on myself, and also the earthliving weapon enchant.
When the buff fades, a woman voice said "Warning!" and i got the icon of Mana Shield/Earthliving Weapon on the top center of my screen.
Well since 4.3 i havent seen it.
I didnt changed any addons, just updated old ones.