Sedo removed the default exclude options for IDN's when searching for domains.
http://sedo.com/search/searchresult....ype=offer_only
This text is still in place however
IDN Domains are "Internationalized Domains Names", they make the use of special non-English characters possible (i.e. Umlauts like "ä", "ö" und "ü", other European Characters like "á", "é", "í"). These domains are subject to many temporary technical restrictions, for example users need an IDN compatible browser to visit them.
We'll get there folks, one step at a time.