asterisk users - May 2006 - Realtime rtignoreexpire bugged ??

All, this doesn't appear normal to me, it appears as if ast is ignoring
the itignoreexpire variable. 

sip.conf snippet:
rtignoreexpire=yes


asterisk -r 
 CLI>sip show settings

--snip--
  Ignore Reg. Expire:     No
--snip--

Does this look like a problem? :-)

Thanks, Matt