Cartmane,
Did someone answer you on this, just noticed I'm getting the same message appearing in my syslog.

Alternatively if there is noway to stop it, can I block the traffic?

Thanks in advance
Iain

No one able to shed any light on this?

I'm hear rumours that DNS is being targeted by hackers to penetrate system and I'm worried this is part of an attack strategy..

Be interested to know...