errors in guarddog firewall

[Mauro Darida <robertnospam@nonsense.com>]

hello, after upgrade from sarge to etch I cannot use guarddog anymore. In 
fact, it gives a series of errors:
Using iptables.
Resetting firewall rules.
Loading kernel modules.
FATAL: Module ip_conntrack_irc not found.
FATAL: Module ip_conntrack_ftp not found.
Setting kernel parameters.
Configuring firewall rules.
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
iptables: No chain/target/match by that name
Finished.

kernel modules are not an issue, because they are built into my kernel and the 
same error appeared in sarge with no consequences.
The "No chain/target/match by that name" is new and is a mistery to me. If I 
apply the firewall, the internet connection gets lost.