asterisk users - Sep 2005 - SIP/2.0 487 Request Terminated problem on Cisco 7960

With todays CVS head I am getting the following  being sent after a call has 
been terminated
on my Cisco 7960. It eventually gives up with a critical error.

chan_sip.c:1132 retrans_pkt: Maximum retries exceeded on transmission 
000b46a0-8661000a-4405e325-7e25031f@192.168.123.20 for seqno 102 (Critical 
Response)

Any ideas I am sure it was working ok with cvs head a month ago.

Chris

---- sip debug ----

Retransmitting #7 (no NAT) to 192.168.123.20:5060:
SIP/2.0 487 Request Terminated
Via: SIP/2.0/UDP 192.168.123.20:5060;branch=z9hG4bK49428a54
From: "Chris Stenton" 
<sip:201@pbx.gnome.co.uk>;tag=000b46a0866100290e5a9947-05a960d9
To: <sip:607@pbx.gnome.co.uk;user=phone>;tag=as4d62d2f2
Call-ID: 000b46a0-8661000a-4405e325-7e25031f@192.168.123.20
CSeq: 102 INVITE
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Contact: <sip:607@192.168.123.12>
Content-Length: 0

Chris Stenton wrote:
> With todays CVS head I am getting the following  being sent after a call
> has been terminated
> on my Cisco 7960. It eventually gives up with a critical error.
> 
> chan_sip.c:1132 retrans_pkt: Maximum retries exceeded on transmission
> 000b46a0-8661000a-4405e325-7e25031f@192.168.123.20 for seqno 102
> (Critical Response)
> 
> Any ideas I am sure it was working ok with cvs head a month ago.
> 
> Chris
Chris, one error message out of context won't say anything to me more
than the phone is having a problem with it's mental state. Propably a
cousin to Marwin, the depressed robot.

Please give me a full SIP debug with verbose set to 4 and debug set to 4
so I can figure out what's going on!!

/O ;-)