> More likely the problem it has is due to the omitted /CIDSet in the font descriptor.
> 
> The error is in the display engine, not the text extractor (since cut&paste work ok).
> And that means the problem is almost certainly not the cmap. The only other non-trivial
> difference I saw in the old vs. new pdf was that no longer present /CIDSet.
> 
> Unf., generating one in the text editor is bit beyond me-on-the-could mode, so I can
> not be certain of that although it seems likely (I checked with FF that the two glyphs
> are indeed in the embedded font subset and in the exact slots the pdf says they have, so
> that is also unlikely to be the problem.)
> 

I’m not familiar with the internals of pdf files.

When i use firefox as pdf viewer, the font information seems to go void in the new version (fun1.pdf).