I went to the Bazaar Sewers and found the Brotherhood hideout. I killed a bunch of assassins and their trainees. I went into a building (killed some more) and opened a door. I encountered a pretty powerful type named Dandras Vules. I noticed that his hit points were just about exhausted and then this dialogue came up that said something about he would have to kill me now and complete the contract. It just kept saying it over and over and over endlessly. I could not say goodbye to get rid of it.
Is this a problem that anyone else has discovered?
I probably am not patched current enough, so I am going to download whatever the recent patch is. I hope this will help. If anyone has any advice, please provide.