Whenever my message logs rotate, ipchains stops logging PACKET alert 
messages. I cannot see this in Bugzilla but did find the symptom mentioned 
in deja.com postings. 

Other posters implied a restart of syslogd would resolve but when I -
SIGHUP to restart, logging still doesn't occur.

Flush and reload of chains has no effect either.

Only solution to date appears to be a re-boot, all then reverts to normal.

As far as I can tell ipchains is still doing what it should in terms of 
managing access but there is no longer any visibility of foreign scans.

Other log messages appear normally.