Even though audacity adds id3 tags programs like 'id3v2' and 'qmp3info' can't read them because there is no valid header info.
In fact, the problem (which still exists) seems to be caused by audacity outputting NUL bytes at the start of the files it produces. In all the examples I've seen, it's 417 zero bytes. Removing them (e.g. with mp3check) makes the files recognised fine by programs such as file and id3.
The current version is still affected. Cheers, Benjamin
it creates a header somehow, i can read it with rightclick in nautilus > preferences > audio. but with id3v2 it still can't be read, it says "No ID3 tag"...