Version: 4.4.3 (KDE 4.4.3) (using 4.4.3 (KDE 4.4.3), Debian packages) Compiler: cc OS: Linux (i686) release 2.6.32-4-686 Since yesterday, the Egyptian Ministary of Communication is reachable at http://xn----rmckbbajlc6dj7bxne2c.xn----rmckbbajlc6dj7bxne2cxn----rmckbbajlc6dj7bxne2cxn--wgbh1c/ When trying to access this domain, Konqueror will simply replace it with "http:/" and do nothing. Iceweasel & Chromium work as expected. Unfortunately, I am unable to c&p the UTF-8 link into this form so please view the proper link at http://www.heise.de/newsticker/meldung/Erste-komplett-nicht-lateinische-Domains-gehen-online-995755.html
FWIW, copying from Iceweasel & Chromium fails as well, but that might be KDE's / klipper's fault, as well. Also, the bug is valid for both Konqueror with Webkit & KHTML.
http://bugreports.qt.nokia.com/browse/QTBUG-10511