Over in the Bethesda Softworks forum (http://forums.bethsoft.com/), it is the general consensus that this issue was introduced in the v1.3.10.0 patch and there is no way for us users to fix it short of waiting for the v1.4 patch, due out sometime this month, and hope that Bethesda addresses it then. You could use the setstage command to artificially complete that section of the quest, but for all intents and purposes, "The Way of the Voice" quest is broken from that point forward as none of the remaining events in the quest occur short of making them happen using the console. Like you, I am stuck at the same place right now (having successfully completed it with another character while using a pre-v1.3.10.0 version of Skyrim) and have decided to wait for the v1.4 patch for a fix before deciding on an alternate course of action.