One of the odd things that's always interested me is the subject of poisons, and how they work. Lots of stuff in movies and books- most of that of little or no accuracy- and lots of folklore.
Barking Moonbat Early Warning System found an article about a poison old in its region, new to everyone else(which is often how it works). From a tree, effects much like foxglove, but not detected the same way. Next edition of 'Deadly Doses' is going to have to add this in.
Also at BMEWS, Christmas Controversies