what's changed with newsyslog?

In the past week or so I've been getting warnings like this ..

bzip2: Can't open input file /var/log/snmpd.log.0: No such file or
directory.
newsyslog: `/usr/bin/bzip2 -f /var/log/snmpd.log.0
/var/log/fwlw_clean_log.0' terminated with a non-zero status (1)

I've checked the relevant /etc/newsyslog.conf and its /usr/local/etc
counterpart to ensure there are tabs in the right places but the errors
persist.

Similarly, the relevant files are there and seem to be rotated as
expected/desired ..

-rw-r--r--  1 root  wheel         77 Dec 17 09:00 fwlw_clean_log
-rw-r--r--  1 root  wheel      11282 Dec 17 09:00 fwlw_clean_log.0.bz2
-rw-r--r--  1 root  wheel       9452 Dec 17 05:00 fwlw_clean_log.1.bz2

 [ .. ]

-rw-r--r--  1 root  wheel      50992 Dec 17 09:45 snmpd.log
-rw-r--r--  1 root  wheel       1834 Dec 17 09:00 snmpd.log.0.bz2
-rw-r--r--  1 root  wheel       1846 Dec 17 07:00 snmpd.log.1.bz2


Hints?

	imb