How do you tell if the nbsp and the first seven under Symbols and General Punctuation are correct? Perhaps these need use cases to demonstrate they are working.
For FBReader, which characters get displayed depends on both the encoding and the font used. Under Windows, I got the same result as you did using the Bitstream Vera Sans font but switching to Lucida Sans Unicode got all the characters (except perhaps the punctuation). The font is selected under the Styles tab of the Preferences (Options) icon.
|