IETF Chair Russ Housley has asked WG chairs to apprise their WGs of the
following information.
If you've been following the IETF mailing list, you may be aware of the
ongoing discussion about the impact of RFC 5378 on revised draft
submissions. Briefly, RFC 5378 requires Contributors to grant a more
expansive set of rights than were granted by RFC 3978, and 4748. If you
are submitting a document which contains text contributed by others
prior to the publication of RFC 5378 you may need to obtain additional
rights from the copyright holders of that text in order to contribute
under the 5378 terms.
The IESG and the IETF Trustees are working to resolve those issues
(see
http://trustee.ietf.org/docs/Background-to-Draft-Update-to-IETF-Trust-Legal-Provisions.txt).
However, at present I would advise care prior to submitting any draft
which contains material derived from an RFC, draft, or mailing list
message published prior to November 10, 2008.
Please take any general discussion of RFC 5378 to ietf(_at_)ietf(_dot_)org
spt
[As WG Chair]
PS I copied most of ekr's message.