RFC 4425, "RTP Payload Format for Video Codec 1 (VC-1)", February 2006Source of RFC: avt (rai)
Errata ID: 96
Status: Held for Document Update
Reported By: Alfred Hoenes
Date Reported: 2006-03-06
Held for Document Update by: Robert Sparks
Informative References say:
 Handley, M., Schulzrinne, H., Schooler, E., and J. Rosenberg, "SIP: Session Initiation Protocol", RFC 2543, March 1999.
It should say:
 Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M., and E. Schooler, "SIP: Session Initiation Protocol", RFC 3261, June 2002.
Informative reference points to RFC 2543, but this has been outdated by RFC 3261.
RFC 4425 gives an Informative Reference  to the SIP
specification, used only once, in section 4.7; but the
citation in section 10.2 points to the far outdated RFC 2543
that has been superseded by RFC 3261 on Jul 2 2002.
Because this obsolescence has happened so long ago, I have
conjectured that it must have been ignored purposely following
subtle considerations, and it is not an editorial oversight.