In all fairness to the OP (and I guess myself) this was on the very first day of the launch of the new build. Had not been here in well over a month and on a different PC at that. It just appeared this way from the start and even though others did not post about it, it was being discussed in the shouty box.
No clearing of cache but on a subsequent visit low and behold all was normal / "fixed".
FWIW