What I would like to know is whats the difference between ID3 tag v2.3 and v2.4, iTunes lets you convert/choose between the two. I'm just ready to batch edit the names of the genres that I have and I wonder if it would be faster in the long run to convert the ID3 tag version before I started batch editing my whole library. Right now most of my songs are ID3 tag v2.3, would I benifit if I convert all my music to v2.4?