Hi Alexander, Some domain names have been set up to accept international characters, DE domains being one of them. More info on how to use it is on http://framework.zend.com/manual/en/zend.validate.validating_hostnames.html
However, there have been reports of it not working reliably for some people. This is likely down to character encoding issues. This has been reported in ZF-1083 ( http://framework.zend.com/issues/browse/ZF-1083 ) and I'm looking into why this isn't working for some people. I had uploaded a test script to that page but the upload process messed up the character encoding so that doesn't work. I plan to write up some tests and host them myself to help resolve this. I'll send you a link once I've done this. best wishes, Simon