asterisk users - Dec 2003 - Weird SIP registration warnings in log

Anyone else seen this with recent CVS?
Asterisk CVS-12/05/03-14:25:13 


Dec  9 13:22:46 NOTICE[10251]: File chan_sip.c, Line 2981 
(sip_reg_timeout): Registration for '^B@117.0.0.0' timed out, trying 
again
Dec  9 13:22:46 WARNING[10251]: File chan_sip.c, Line 428 (__sip_xmit): 
sip_xmit
 of 0x81512ac (len 320) to 117.0.0.0 returned -1: Invalid argument

Dec  9 13:33:07 NOTICE[10251]: File chan_sip.c, Line 2981 
(sip_reg_timeout): Registration for 'h^O^ ^C^_@^P@224.5.20.8' timed out,
trying again

Dec  9 13:31:26 NOTICE[10251]: File chan_sip.c, Line 2981 
(sip_reg_timeout): Registration for '^A@0.0.0.0' timed out, trying again

Dec  9 13:32:47 NOTICE[10251]: File chan_sip.c, Line 2981 
(sip_reg_timeout): Registration for '^B@119.0.0.0' timed out, trying 
again


Non-cheers, 
Philipp