Comment 9 for bug 456468

libgtk2.0-0 is updated in line 1130 of my upgrade log. Icon themes are replaced in 1772pp (gnome and hicolor). I looked at the n-m-a source and on icon theme change first all icons are unrefed, then the new ones are loaded. The unref of the icons has the effect that the pixbuf loader gets unreferenced as well and loading it again does no longer work because the old libc/libgtk in memory will not work with the new pixbuf-loader-png