Pretty sure bard songs and beneficial buffs didn't knock you out of hide with release of kunark.
http://teir-dal.tripod.com/id47.html
2.7. What can knock me out of hiding?
Spells and bard songs cast on you will no longer knock you out of hiding unless they are cast by mobs or enemy players in PvP.
Looting corpses (even your own) will also knock you out of hiding, so greed can get you killed if the area is not clear. When trying to recover your own corpse, use the /corpse command to drag your body to a safer spot before looting. Dragging corpses will not ruin your hide.
Picking Pockets and Disarming Traps will also ruin your hide, so be careful!