I'm trying to type in my name in the db shell, which is "Sandström". The same goes for å and ä.

> use staging
switched to db staging
> db.users.findOne({lastname:"Sandstr
-------- [ now I press the character ö on my keyboard ] --------
(arg: 6) db.users.findOne({lastname:"Sandstr

As can be seen no ö is shown and "(arg: 6)" shows up instead.

It should be possible to emulate this by choosing the Swedish keyboard layout in OS X and then pressing the key to the right of "L" on an american keyboard. Use the keyboard viewer from »International« if you have trouble finding the ö key. Don't know if linux have similar capabilities for changing keyboard layouts virtually.