When I try to type certain accented characters, as well as in other alphabets like arabic, WordPress converts them to question marks. The ISO-8859-1 characters like é still show up fine, but any characters outside of those, like Č, become ?.
My database is set to MySQL charset: UTF-8 Unicode, and MySQL connection collation: utf-8_unicode_ci. Is it a database problem or something else? And how do I fix it?