I have the CE, and had this problem, too. Maybe they broke it again with the CE? It was aggravating; I tried to talk to Galebriand again, but he just kept repeating that I need to stop Vecus.
I had to go back to the previous save, which was just before I had entered Ulm. Yay.

I can only suggest that you save before talking to Galebriand, just in case.