Dear Denis,
I hope your surgery went well!
Regarding the issue with the extended Latin symbols – both default fonts used in Fuji (Coda and Open Sans, both of which are Google Web Fonts), are compatible with the characters you mention (I’ve tested them in a fresh installation of Fuji). Could you please tell me which way you are adding these characters to the posts – via the visual editor or the plain text (HTML) editor mode? Also, from the screenshot it looks like not only those symbols look like a different font, but some other as well, hence my question.
Sincerely,
Andrew | Satori