Ran into this myself today (just bought a Hanlin V5) and it's showing large gaps after smartquotes in books that use them that I converted to ePub (haven't tried the original format).
Kovid,
It seems like one solution to this would be to have a (probably defaulted off) conversion option that looks for smart quotes and apostrophes and converts them to vanilla ascii quotes and apostrophes. Do you think that would be hard or trivial thing to do? Just looking through one file I have issues with I see smartquotes sequences as:
E2 80 9C
and
E2 80 9D
apostrophes as:
E2 80 99
In ascii, quotes are 22, and apostrophes are 27. A search and replace in the displayed text areas might be enough. It could possibly even globally, assuming that neither the HTML or CSS portions would be using any of those unicode sequences.
It looks like a pretty good list can be found here:
http://www.utf8-chartable.de/unicode...192&number=128
Meh.
It's probably a function of the reader software as much as anything. I'll give openinkpot a try tomorrow after I buy a smaller SD card and see if it handles them any better.