Sorry, as I expected I can't duplicate this which is why we always ask for the support files. Information is king.
I don't think it is affecting many so up to you if you want to help further or not.
Cheers.
Tom.
ps: The fonts are supposed to be an improvement but could be that. Hard for me to know without further information. It is what it is. The main issue with this for me is there is too big a leap in versions you are using. It could be 1 of a hundred things. i know you are a long time user so won't bust your balls on it!