Hi, @happymacgr,
Please, see these recent discussions on missing non-standard characters:
http://forums.realmacsoftware.com/t/icelandic-characters-missing/9786
http://forums.realmacsoftware.com/t/scandinavian-letters/9997
http://forums.realmacsoftware.com/t/missing-polish-characters-in-rw-7-1-1-solved/10118
Hopefully, one or more of those threads will answer your questions…