hi boris, i am not totally wrong ;-) on my amd64 box there ist no libqtwebkit4 depends.
http://packages.debian.org/sid/psi-plus-webkit shows "dep: libqtwebkit4 [nicht amd64] Web content engine library for Qt" the control file of the psi-plus-webkit_0.15~svn3910-1_amd64.deb shows Depends: psi-plus-common (= 0.15~svn3910-1), libaspell15 (>= 0.60), libc6 (>= 2.2.5), libgcc1 (>= 1:4.1.1), libqca2, libqt4-dbus (>= 4:4.5.3), libqt4- network (>= 4:4.5.3), libqt4-qt3support (>= 4:4.5.3), libqt4-svg (>= 4:4.5.3), libqt4-xml (>= 4:4.5.3), libqtcore4 (>= 4:4.7.0~beta1), libqtgui4 (>= 4:4.6.1), libstdc++6 (>= 4.1.1), libx11-6, libxext6, libxss1, zlib1g (>= 1:1.1.4) on my i386 box it works correctly with libqtwebkit4 depends. regards gilde
