According to [1], Mozilla and Firefox will switch off IDN (and, hence, IRI) support for the time being in order to avoid "payp[lowercase russian a]l.com" like Phishing attacks. The best approach to fixing this is probably to take a look at the ICANN IDN registration guidelines and get these fixed. 1. http://weblogs.mozillazine.org/gerv/archives/007556.html Regards, -- Thomas Roessler, W3C <tlr@xxxxxx>