I only noticed this recently, but this bug may have existed as early as the introduction of the Barrens expansion. If you have a quest that says "cast 10 fire spells", and you cast them discounted by Incanter's Flow, they don't go towards the quest completion. Only cards with their original, full cost are counted. Additionally, there is an achievement that asks you to cast 5 Holy Spells in a turn. Very easy to accomplish when playing as libram paladin, but the same problem, the librams will not count as Holy when discounted. Has anyone else encountered this problem? I didn't see anything in the bug fix notes about it, surely they must address them soon enough?