Before posting I tried changing those properties (i.e. character.set=204)
to no effect.
Currently I have (default values?) "code.page=65001" and commented
> AFAIK, no automatic detection (useless for source code from various
> origins, anyway).
There is no need for it, as I'm not trying to read foreign code page
Other editors including scintilla based have no such problem, as reading
default user code page should be straightforward on any platform I guess