Only suggestion I can think of is to check whether or not you accidentally changed the controls for shouts to something other than z. EDIT: Nevermind, I just re-read your description and it doesn't sound like you did this.Â
Yea. I'm sure it does. This exact issue actually happened to me a while ago and then went away for a while and just came back. I'm trying to force 2xEQ Adaptive AA from the drivers on top of the SMAA injector. I'm starting to wonder if that could be the issue.Â