The unicode does not work for me... Windows 7 + Firefox 3.5.7
But you just posted "ł€¶ſðđ}]ŋ“„µöäü" above without a problem.
Also, enabling Unicore could that not be a security problem?
Huh? Why should there be any security concern? The characters aren't even stored in a Unicode encoding (like UTF-8) on the server. They get converted to HTML entities (e.g. "m") before the post is submitted, so only ASCII characters are stored in the database.