It appears that Buster's version of taglib: ii libtag1v5:amd64 1.11.1+dfsg.1-0.3 amd64 audio meta-data library
now writes ID3v2.4 tags by default (and uses the new UTF-8 text encoding too.) This means that any program that uses this library (lots of KDE perhaps?) will make files that are not readable by id3v2. :( Perhaps it's time to pension off id3v2? Mike.
