http://kde-apps.org/content/show.php...content=129817

or

Set "QT_GRAPHICSSYSTEM=raster" as environiment variable.
For Ubuntu/Debian -> /etc/environiment
For Gentoo -> # echo "QT_GRAPHICSSYSTEM=raster" >> /etc/env.d/45kde_user_raster

Both require qtlibs >= 4.7