asterisk users - Jul 2004 - rtp.c:487 ast_rtp_read: Unknown RTP codec 72 received

After just having update to the latest CVS I am getting the following
message when I call VoicemailMain():

    -- Executing VoiceMailMain("SIP/2302-1a12", "") in new
stack
    -- Playing 'vm-login' (language 'en')
    -- Playing 'vm-password' (language 'en')
    -- Playing 'vm-youhave' (language 'en')
    -- Playing 'digits/3' (language 'en')
    -- Playing 'vm-INBOX' (language 'en')
    -- Playing 'vm-messages' (language 'en')
    -- Playing 'vm-onefor' (language 'en')
    -- Playing 'vm-INBOX' (language 'en')
Jul 26 22:40:39 NOTICE[262160]: rtp.c:487 ast_rtp_read: Unknown RTP
codec 72 received
    -- Playing 'vm-messages' (language 'en')
Jul 26 22:40:40 NOTICE[262160]: rtp.c:487 ast_rtp_read: Unknown RTP
codec 72 received
    -- Playing 'vm-opts' (language 'en')
    -- Playing 'vm-changeto' (language 'en')
Jul 26 22:40:45 NOTICE[262160]: rtp.c:487 ast_rtp_read: Unknown RTP
codec 72 received
 

I am not sure where this is coming from, but as soon as I hangup on the
SIP client Asterisk dies.  I get the following messages on the console:

promed_pbx*CLI> /usr/sbin/safe_asterisk: line 82: 14626 Killed
asterisk ${ASTARGS} 1>&/dev/${TTY} </dev/${TTY}
Asterisk ended with exit status 137
Asterisk exited on signal 9.
Automatically restarting Asterisk.

Just as a bit of background I am using rgagnon's ast_data patches for
both sipfriends and extensions, and haven't had any problems yet.  I
found two results similar to this on google, but I did not see an
answer.  If anyone can help me with this please let me know.

Thanks,

Robert Jackson