hi
I've the same problems
I'm using v. 1.31
I,ve a tag named Attualitą (with the last a accented)
Part of the saving model to the reader has that tag
so on my reader I've the folder Attualitą (with accent) but that is a correction made by me
the files go on a 4gb FAT sd micro
as I can remember, always Calibre saves without accent in the path, even with the option you shown disabled (even from windows, I don't know from linux)
on the other side, in some filenames of the library I've the & char
this is only to understand obviously! I love this perfect program!