named issue

[Jos Chrispijn]

[named]

Lately I get messages like thin in my all.log:

named[605]: too many timeouts resolving '*.*.*.*.zen.spamhaus.org/A' (in 
'zen.spamhaus.ORG'?): disabling EDNS

(*) is random ip address

Now before I add the following lines in /etc/named.conf or 
/var/named/chroot/etc/
named.conf:

logging {
category lame-servers {null; };
category edns-disabled { null; };

};

I would like to know what I could do to prevent generation of that line?

Thanks,
Jos Chrispijn