Well, adding write support for Id3v2.3 isn’t really a bad idea. The bad idea is staying up until 4 in the morning on a 6 hour coding spree. Revision 73998 contains a tonne of minor code changes and a single powerful static property:
This can be set to 2, 3, or 4, but it is very important to recognize that internally, all tag data is stored as Id3v2.4. This means that you may lose a few frames while reading and you may lose a few frames while writing. Use this with caution.