Not sure if this counts as 'Today'. It's taken me 2 months to work out why I'd had an increasingly noticeable knock on crank rotation - once per rotation. I couldn't find anything wrong with cranks or bottom bracket (cartridge type on Defy 2.5), I serviced the pedals, and the only time I felt the knock was when riding. And it was getting very frustrating. But now it's gone.
I fitted a new cassette and chain (both Shimano HG) and rear mech wheels about 300 miles ago - no problems, nice and quiet. But, over the winter I'd cleaned the chain a few times by removal (I have a quick link), soaking in FS1, brush off, wash in hot water, hang up to dry overnight in warm workshop, lube and refit - with Mickle method after every ride in between soakings.
In an effort to get rid of the knock, I applied more and more lube (FS Dry or Wet) each time I Mickled (is there a verb - To Mickle?). And eventually the knock's gone. The 50 miles yesterday and today have been like those honeymoon days when the bike was new - only the hiss of tyres on tarmac, and the wind in the hair, birds in the trees etc.
From which I conclude that I'd effectively removed all the original lube from the chain by soaking in FS1, and not put enough back afterwards, or even after Mickleing. The chain's still like new, no wear or stretch, clean shiny links and all that, and the cassette and chain rings are clean, but the drivetrain no longer creaks or indeed makes any sound at all. Perfect. And a lesson learned. Another one...... Don't clean by soaking unless you really put a lot of lube back afterwards, and not just a 'drop' per roller. Soak the bl**dy thing.