This is the KDE4/Qt4 component of the QtCurve theme engine. Works fine with plain Qt4 only, too.
Created attachment 136700 [details] x11-themes/qtcurve-qt4-0.55.1 ebuild
Created attachment 136712 [details] x11-themes/qtcurve-qt4-0.55.1.ebuild Ebuild using cmake-utils eclass.
qtcurve-qt4-0.55.1 added to the tree, x86: all other qtcurve related packages (x11-themes/qtcurve and x11-themes/gtk-engines-qtcurve) have ~x86 - please keyword ~x86 x11-themes/qtcurve-qt4 also.
~x86 added, I assume this bug can be closed...