It seems that lltag does not specify encoding of written tags for mp3
files. As a result, tags with non-ASCII characters written in lltag are
displayed malformed in other programs. I did check mpd, easytag and
puddletag. id3v2 displays them correctly, but if I'm correct, id3v2
does not care about encoding as well.

I think that the best way is to create new option for that. If
unspecified, lltag should behave the same as now. I'm not sure
if defaulting to user locale is good idea (for me it is, but don't know
about others).

I found little (200 lines of code) GPLed perl script called
mp3_tag_iconv[0]. It changes encoding of ID3 tags. Maybe
lltag could borrow some code from it?

There is also mid3iconv which changes tags encoding to unicode. It is in
python-mutagen Debian package.

You can find some threads about ID3 encoding on perlmonks.org. They may
be handy.

Best regards

[0] <http://code.google.com/p/mp3-tag-iconv/>