Well in this feed that I'm using for example (
http://feeds.feedburner.com/GoogleAlert-Cannabis) some characters like the € (Euro symbol) is shown as a square. And when it then gets posted to my forum via RSS manager, the square is displayed as a ? (question mark). This happens with other characters to like " also.
Language Code = en
HTML Character Set = ISO-8859-1
In phpMyAdmin most of my database tables are set to latin1_swedish_ci
I changed some of the tables (post, thread etc) to utf8_general_ci to see if this would fix the issue but it did not.