Error with InetBase.pm

[Alex Regan]

Hi,

I have a fedora20 box with amavisd-new-2.9.1, spamassassin, postfix, and 
perl-NetAddr-IP-4.071 with perl-5.18.4 and receiving the following error 
(warning?):

May  1 16:53:15 mail02 amavisd[27671]: Starting amavisd: Subroutine 
inet_any2n redefined at ../../blib/lib/NetAddr/IP/InetBase.pm
May  1 16:53:15 mail02 amavisd[27671]: (autosplit into 
../../blib/lib/auto/NetAddr/IP/InetBase/inet_any2n.al) line 485 (#1)
May  1 16:53:15 mail02 amavisd[27671]: (W redefine) You redefined a 
subroutine.  To suppress this warning, say
May  1 16:53:15 mail02 amavisd[27671]: {
May  1 16:53:15 mail02 amavisd[27671]: no warnings 'redefine';
May  1 16:53:15 mail02 amavisd[27671]: eval "sub name { ... }";
May  1 16:53:15 mail02 amavisd[27671]: }
May  1 16:53:15 mail02 amavisd[27671]: Subroutine ipv6_aton redefined at 
../../blib/lib/NetAddr/IP/InetBase.pm
May  1 16:53:15 mail02 amavisd[27671]: (autosplit into 
../../blib/lib/auto/NetAddr/IP/InetBase/ipv6_aton.al) line 406 (#1)

It appears sometimes it's a fatal error and other times it doesn't 
appear at all. I'm not sure what the cause could possibly be, but hoped 
someone had seen it before and might know where to look?

Thanks for any ideas.
Alex