Any progress?

It also changes with time: most examples I gave above now render at normal size. But it's not all fixed, just changed e.g. http://latex.codecogs.com/png.latex?%5Cdpi%7B200%7D%20j is super-sized (cf. http://latex.codecogs.com/png.latex?%5Cdpi%7B200%7D%20jj which is normal).