1" headset with French thread

[Superkav]

WTF is that?? Does it have a different tpi or does the thread go the wrong way?? or once installed does it constantly look down it's nose at you and whine on about how much better the French are than the English??

I've never seen forks for sale with a French thread, someone please explain.

[kdw712]

have look at sheldons browns page

scroll down a bit to the table
that may explain the what but not the why 

http://sheldonbrown.com/gloss_ha-i.html#headset

[Superkav]

Aaaaaaaaaaaaahhhhh  Mmmmmmmmmmmmmm nnnnnnnnn ppfffppfrrrrr