Comment 9 for bug 300130

UPDATE: The Heyu code has been relicensed under GPLv3. New maintainers have verified that all of the original (missing or un-locate-able) author's pre-GPL-era code has been rewritten or removed, and they obtained consent for the relicense action from the subsequent maintainers (or, in one case, from the legal executor of his estate). That means that there is no longer a license conflict.

Details are in this thread on the Heyu mailing list: http://tech.groups.yahoo.com/group/heyu_users/message/6630