Bug Report: Non-ASCII Links Break
Use any link that uses characters not found in ASCII but found in Unicode in the forums and the link will truncate right before the first non-ASCII character. This is shown at http://www.duolingo.com/comment/1418492, where a link to http://en.wikipedia.org/wiki/Téléfrançais is not processed correctly. Because many links I have seen need to use Non-ASCII characters, this is an issue which needs to be fixed with the parser.
If you visit your site with Chrome (and possibly other browsers, but certainly not Safari) then copy the URL from the address bar it will be converted to an ASCII friendly format like this: http://en.wikipedia.org/wiki/T%C3%A9l%C3%A9fran%C3%A7ais.