Hi, 

starting with this changelog entry:

* Fr Jan 09 2009 pbaudis@suse.cz
- Fix unsetenv() crashing after clearenv()
- Backport various DNS-related fixes from CVS
- Disable parallel A-AAAA queries - revert to the glibc-2.9 behaviour
  of sending the queries sequentially [bnc#442572]
- Fix fp register protection on power6 setcontext() [bnc#464738]


all dns lookups in Qt 4.x/KDE applications fail. stopping nscd and downgrading glibc to 11.1 state fixes it. 

=== test app===
#include <qhostinfo.h>
#include <QDebug>
#include <QtGui/QApplication>
#include <QtNetwork/QTcpSocket>

int main(int argc, char **argv)
{
    qDebug() << QHostInfo::fromName("www.opensuse.org").addresses();
}

=== ===

expected result: "1.2.3.4" (some ip address), actual: ""

compile by putting into an empty directory, call

sudo zypper in libqt4-devel
qmake -project
qmake
make