Opening an .nfo saved as utf-8 loads the file fine, however if you edit and save it, all unicode characters silently change to ????.
When looking at the encoding menu, no encoding is selected anywhere, selecting utf-8 prompts me if I want to apply all unsaved changes, then proceeds to butcher the file to a sea of question marks.
Changing the extension to .txt, the same file detects as utf-8 just fine and I can edit it as usual. Currently using v6.3.3 (Unicode)