In message <3C7D7206.C480990@augustsson.net>, Lennart Augustsson writes:
>Does it report 32 for any other key?
>Maybe MacOS knows about the problem and remaps the key?

A bit of further verification:

* If I use this KVM switch with my mac, the \ does indeed work.
* If I use a different USB<->PS/2 widget with NetBSD, the \ also works.

Does anyone know of a real world keyboard that uses this key which is '#'
unshifted, and '~' shifted?  I've never seen one.  Maybe we need a keymap
quirk table for ukbd.

-s