as i get bounces from action@nanog.org and all other similar contacts,
here we go
https://www.nanog.org/archives/presentations?k=0&s=Douglas%20Maughan&m=0&a=search
gives me clickables to the 56 agenda. but those clickables lead me to
https://www.nanog.org/meetings/56/agenda
which gives me
Page not found
The requested page "/meetings/56/agenda" could not be found.
sigh
randhy
Hi Randy:
We look into the situation now.. Very sorry for the error.
All best.
Betty
We look into the situation now.. Very sorry for the error.
i demand a full refund! 
Thanks very much for alerting us to this issue, and apologies for the
inconvenience.
When search was done by name it was throwing an error on the agenda path
omitting 'nanog' from the path, hence the 404 page.
This is now fixed. Kindly let us know if you run into any more issues
with this.
no biggie. bugs happen. of course, i never have any
randy