Of late, I see this alot:

Aug 24 21:03:54 gate named[111]: sysquery: findns error (NXDOMAIN) on ack.org?

Which is somewhat disconcerting seeing how this is my own domain.

It's only started Saturday.  My NS list at my parent and the
list I publish is seemingly correct.  I have also examined the
source for BIND.  For the life of me I have *no* idea why named is
complaining.

Has anyone seen this before?  A hint perhaps?