This year higher levels than normal of tutin are being detected, especially on the east coast of the North Island of NZ.
Watch this video from the Bee Products Standards Council for a good description of tutu.
The short answer is, DON'T EAT COMB HONEY unless you have had your honey tested, and be really careful eating extracted honey that has been blended. If you are selling honey you are legally required to get your honey tested for tutin.
I also wrote about this in this