Comment 14 for bug 338083

@Ricky, Jim:
My /var/log/messages.0 hasn't been modified for about a week. The 'messages' files are not rotated every boot, but once per week. Here's a listing of my /var/log/messages*

-rw-r----- 1 syslog adm 339444 2009-04-22 10:04 /var/log/messages
-rw-r----- 1 syslog adm 207454 2009-04-16 05:13 /var/log/messages.0
-rw-r----- 1 syslog adm 198544 2009-04-09 01:28 /var/log/messages.1.gz
-rw-r----- 1 syslog adm 11422 2009-04-02 13:15 /var/log/messages.2.gz

As you can see from the following excerpt, all the messages in messages.0 are old:

cdb@svelte:~$ tail /var/log/messages.0
Apr 16 02:13:37 svelte -- MARK --
Apr 16 02:31:06 svelte kernel: [15466.089053] ACPI: EC: missing confirmations, switch off interrupt mode.
Apr 16 02:53:37 svelte -- MARK --
Apr 16 03:13:37 svelte -- MARK --
Apr 16 03:33:37 svelte -- MARK --
Apr 16 03:53:37 svelte -- MARK --
Apr 16 04:13:37 svelte -- MARK --
Apr 16 04:33:37 svelte -- MARK --
Apr 16 04:53:37 svelte -- MARK --
Apr 16 05:13:37 svelte -- MARK --

I have rebooted a number of times since 16 April.