Google says:

"It's not your problem unless you operate one of the nameservers 
listed.  If you don't want to see the messages, add:

  category lame-servers { null; };

...inside your logging { } statement.  See the ARM for details."

http://marc.theaimsgroup.com/?l=bind9-users&m=101650833919720&w=2

As near as I can tell from other things google found, it's a 
misconfiguration on the other servers.  Something like them 
claiming to be authoritative where they aren't or some such.

Hal

Mark Hutchings wrote:
> 
> Every day, one of my Red Hat 7.2 DNS servers sends me 
> it's logwatch via email.  For the last 2 days, I've 
> been getting this in it's report.
> 
-- Log snipped --
> 
> I know PlanetKC is a local ISP.  I have nothing in BIND 9 that 
> has to do anything with PlanetKC.  And the other 2 just confuse 
> me.   Can someone enlighten me on what is going on or what 
> could be going on?
> 
> -- 
> Mark Hutchings
> desynergy@onebox.com - email