See the post <email@example.com> in pl.test newsgroup - www version here:
The subject should be "Zażółć gęślą jaźń", but instead it's encoded as =?UTF-8?B?WmHFvMOzxYLEhyBnxJnFm2zEhSBqYcW6xYQ=?= (looks like Base64?). According to RFC3977 the headers should be in UTF8 anyway, so why do the additional encoding at all?
I'll see what can be done about it.
After careful re-reading the RFC, I must admit I was mistaken - while UTF-8 is now the default encoding of the protocol, the RFC advises against using UTF-8 in header values, instead recommending MIME. Sorry for confusion.
Thanks for the message.