Weird Message

Ok, every so often I get a message in root-tail out of
/var/log/messages like such:

Oct 31 21:43:15 linux modprobe: Note: /etc/modules.conf is more
recent than /li$
Oct 31 21:43:15 linux modprobe: modprobe: Can't locate module
net-pf-10
Oct 31 21:43:15 linux modprobe: Note: /etc/modules.conf is more
recent than /li$
Oct 31 21:43:15 linux last message repeated 2 times
Oct 31 21:43:15 linux modprobe: modprobe: Can't locate module
net-pf-11
Oct 31 21:43:15 linux kernel: NET4: Linux IPX 0.38 for NET4.0
Oct 31 21:43:15 linux kernel: IPX Portions Copyright (c) 1995
Caldera, Inc.

I'm running Mandrake 7.2 Kernel 2.2.19-secure on an AMD K6-2 300
clocked down to 233. Any clue as to what's going on?

****************************************************
Sonja Michelle L. Thomas
sonja@sdf.lonestar.org