flac & crappy id3 tags

There are many music players which can normally play flac files. But in real life, those applications do not recognize some flacs. In most cases, the reason is very simple: this "not recognizable" flacs are containing additional id3 tags. Id3 tags are little bit different from vorbis tags that are used in flac files normally.
Fixing this kind of problems is quite simple by removing id3tags from flacs. It can be done with linux command line tool.
For example, following command finds all flac's from current directory (and subdirectories) and removes id3tags from them:
find . -name "*.flac" -exec id3v2 --delete-all {} \;