Strage system messages in 8.3

[Olivier Nicole]

Hi,

Two night ago, I upgraded my main server to FreeBSD 8.3 and since, I
get those messages:

Message from syslogd at banyan at Oct 19 01:15:32 ...
banyan kernel: )

Message from syslogd at banyan at Oct 19 01:19:31 ...
banyan kernel: :1b

Message from syslogd at banyan at Oct 19 07:40:00 ...
banyan kernel: 26,

Message from syslogd at banyan at Oct 19 08:39:00 ...
banyan kernel: 70t

Message from syslogd at banyan at Oct 19 09:36:24 ...
banyan kernel: ]:d

Message from syslogd at banyan at Oct 19 09:59:45 ...
banyan kernel: :5d 

I have all my servers running the same release, and this is the only
on exibiting such behavious.

FreeBSD banyan.cs.ait.ac.th 8.3-RELEASE-p4 FreeBSD 8.3-RELEASE-p4 #5:
Wed Oct 17 18:32:54 ICT 2012
root at banyan.cs.ait.ac.th:/usr/obj/usr/src/sys/CSIM amd64

The custom kernel only includes quota, nothing fancy, rest is generic.

What these messages could be?

Best regards,

Olivier