This is a nice module, but it could need some improvements.
In the files tellafriend.htm and thankyou.htm you need to add in the head part:
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
This to allow it to be translated, and/or use of some special latin characters like Ã¦Ã¸Ã¥ - among others. Also a language file would be nice to store the translations in.
Also the tellafriend.php need to be altered in some way to allow special characters to be used, and show up correctly in all email clients. And that part haven't I figured out how to fix yet ....
Edit! More info and suggestions available here: http://www.shape5.com/component/option,com_smf/Itemid,75/topic,47.msg5062#msg5062