As soon as WP did an auto update I was having problems.
As soon as I deactivated W3 Total Cache.. the problems disappeared...
I was lucky to have noticed, in admin mode I wasnt seeing it.. but I was building a forum and logged out to test it.. that's when I saw it. Logged back in.. it worked again.. that was my first clue. At first I thought it was the Revolution slider, because that's where it was most noticable.. but after hrs of trying this and that... it was when I deactivated Total Cache that everything was normal again.
I hope this gets resolved, right now it seems that Total Cache is not compatible with 3.8.1. I hate having it off and hope it doesnt effect my google ratings too badly with the slower download speed.