This is driving me crazy. All addons off except ElvUI, Elv Config and Best in Slot Redux. I backed-up all my files and started with everything clean, just in case it was a corrupted file... For some reason if I disable the Thin Boarder Theme, I get a small boarder out lining the BIS Manger menu. If I enable thin boarders it goes away and looks fine. I get no error or anything just this boarder. I also found that if I disable Ace3 under ElvUI skins option it goes away as well. Any ideas?
This is with Thin Boards disabled:
Then thin boards enabled: