iptables generates unwanted output

[Joris Huizer <jorishuizer@planet.nl>]

Hello,

I recently set up iptables (that is, I replaced /etc/init.d/iptables 
with the script I got).

Now, when I'm on one of the tty' terminals, I get this message each time:

INPUT packet died: IN=eth0 OUT= MAC= SRC=10.0.0.150 DST=10.0.0.255 
LEN=131 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=631 DPT=631 LEN=111

it looks like a lot of packages with identical properties, are sent to 
my computer; Maybe it's important to know, my internet connection is 
dhcp and it uses dynamic IP addressing (could that cause such a problem?)

So basically, I've got two questions,
What could be causing this?
How can I make iptables stop generating output on the tty - and let it 
write in some kind of logfile instead?

Thank you for your help,

Joris