Okay - I have no idea how this has happened but all my settings have gone back 2 weeks.
Things like portal layout settings and new post indicators on the main forum list have all reverted to old versions.
No restore has taken place or anything like that - it is all very strange - there is also no mention of anything being changed in the admin logs.
Mind you there was a sign in eastenders tonight in the newsagents saying 'don't forget valentines day' - so have I gone back in time by 2 weeks LOL
All very strange....