I noticed this bug after starting a new game last night. For some reason wolves make absolutely no noise when they howl. I restarted my game from scratch twice and even deleted and re-installed the game to my hard drive, there was no change. This is extremely annoying especially when I get attacked by a pack of wolves with no warning at all. It must have been caused by the most recent update and if something like this is broken there is no telling what else is screwed up. I want to start new games with new characters but not until this bug is fixed.