Not valid e-mail header when translating to Swedish

[prestalollo]

Hi,

 

I am setting up a PS 1.5.4.1. When I am translating e-mail headers (I tried only 1 so far, $_LANGMAIL['New message regarding your order'] in lang.php for my language, I am getting a "Not valid header" when trying to send a message to the customer from admin. When using the English original string, it works.

 

What is this about?

 

Update: it seems to be the Swedish letters that is causing it - when writing in Swedush without å, ä, ö, it works.

 

Still though, does anyone know how to fix this?

 

Thanks

 

Kindly

Edited June 21, 2013 by prestalollo (see edit history)