[Asterisk-Users] chan_sip errors on CVS HEAD

[Asterisk]

I've got a test * server (hppbx) where I install CVS-HEAD as often as 
possible, with my extension registered to this, talking through IAX to 
our production server which then channels out to the PSTN.

After completing a call just now, the following appeared on the CLI of 
hppbx (the 90xxxxxxxxxxx is a valid number, changed to protect the guilty):

  == Spawn extension (from-sip, 90xxxxxxxxxxx, 1) exited non-zero on 
'SIP/711-31db'
Feb 16 12:42:38 NOTICE[14535]: chan_sip.c:2927 copy_header: No field 
'From' present to copy
Feb 16 12:42:39 NOTICE[14535]: chan_sip.c:2927 copy_header: No field 
'From' present to copy
Feb 16 12:42:41 NOTICE[14535]: chan_sip.c:2927 copy_header: No field 
'From' present to copy
Feb 16 12:42:45 NOTICE[14535]: chan_sip.c:2927 copy_header: No field 
'From' present to copy
Feb 16 12:42:49 NOTICE[14535]: chan_sip.c:2927 copy_header: No field 
'From' present to copy
Feb 16 12:42:53 NOTICE[14535]: chan_sip.c:2927 copy_header: No field 
'From' present to copy
Feb 16 12:42:57 NOTICE[14535]: chan_sip.c:2927 copy_header: No field 
'From' present to copy
hppbx*CLI> show version
Asterisk CVS-HEAD-02/05/05-09:30:42 built by root at hppbx.tessera.co.uk on 
a i686 running Linux
Feb 16 12:43:01 NOTICE[14535]: chan_sip.c:2927 copy_header: No field 
'From' present to copy
Feb 16 12:43:05 NOTICE[14535]: chan_sip.c:2927 copy_header: No field 
'From' present to copy
Feb 16 12:43:09 NOTICE[14535]: chan_sip.c:2927 copy_header: No field 
'From' present to copy
hppbx*CLI> show channels
        Channel  (Context    Extension    Pri )   State Appl.         Data
0 active channel(s)

There are no more errors after this.

Anyone else had this ?

Julian.