I'm going to write a new FAQ entry on this subject.

In that case, I'll correct myself a bit: ID3Lib can read and strip Lyrics tags correctly, just not edit or rewrite them. Attacking your file with an ID3 tag stripper, then adding back V2 and/or V1 tags, will fix your problem -- as, for Linux users, will the half-assed tag editor I lashed up the other day.

Peter