Bug #420433 lately introduced the discussion again if and when we should support older (deprecated) toolkit versions.
As for the named bug it may make sense to support it, cause the gtk3 useflag would lead to different (reduced) functionality of that package. (but that shall not be the discussion here) Generally I think gtk3 useflags should be avoided and only be a workaround during migration to gtk+:3. Optimally gtk+:3 should always be forced when available and not leading to major issues. On the other hand... if gtk+:3 implementation is broken I would suggest to simply force gtk+:2 without any gtk3 useflag. So we have ONE working toolkit version. Introducing stuff like gtk3 useflag will let users think this is about choice, but it's actually not (gtk+:2 is not being developed any longer afais). Would it make sense to add a tracker for packages currently using gtk3 useflag, so this will not become a habit and only be a workaround? # quse -N gtk3 app-editors/emacs/emacs-24.1_rc.ebuild app-editors/emacs-vcs/emacs-vcs-24.1.9999-r1.ebuild app-emulation/virt-viewer/virt-viewer-0.4.2.ebuild app-emulation/virt-viewer/virt-viewer-0.5.2.ebuild app-emulation/virt-viewer/virt-viewer-0.5.3.ebuild app-i18n/fcitx/fcitx-4.2.1.ebuild app-i18n/fcitx/fcitx-4.2.4.ebuild app-i18n/fcitx-configtool/fcitx-configtool-0.4.1.ebuild app-i18n/fcitx-configtool/fcitx-configtool-0.4.4.ebuild app-i18n/ibus/ibus-1.4.1.ebuild app-i18n/ibus-unikey/ibus-unikey-0.6.1.ebuild app-i18n/uim/uim-1.7.1-r1.ebuild app-i18n/uim/uim-1.7.1.ebuild app-i18n/uim/uim-1.7.3.ebuild app-i18n/uim/uim-1.8.0.ebuild app-office/libreoffice/libreoffice-3.6.9999.ebuild app-office/libreoffice/libreoffice-9999-r2.ebuild gnome-base/librsvg/librsvg-2.34.1-r1.ebuild gnome-base/librsvg/librsvg-2.34.2.ebuild lxde-base/lxdm/lxdm-0.4.1-r1.ebuild lxde-base/lxdm/lxdm-0.4.1-r2.ebuild lxde-base/lxdm/lxdm-0.4.1-r4.ebuild lxde-base/lxdm/lxdm-0.4.1-r5.ebuild media-libs/libcanberra/libcanberra-0.28-r5.ebuild media-plugins/audacious-plugins/audacious-plugins-3.2.2-r1.ebuild media-plugins/audacious-plugins/audacious-plugins-3.2.3.ebuild media-sound/audacious/audacious-3.2.2-r1.ebuild media-sound/audacious/audacious-3.2.3.ebuild media-sound/mp3splt-gtk/mp3splt-gtk-0.7.0.930.ebuild media-sound/mp3splt-gtk/mp3splt-gtk-0.7.1.ebuild media-sound/mp3splt-gtk/mp3splt-gtk-0.7.2.ebuild net-dns/avahi/avahi-0.6.30-r1.ebuild net-dns/avahi/avahi-0.6.30-r3.ebuild net-libs/gtk-vnc/gtk-vnc-0.4.3-r1.ebuild net-libs/gtk-vnc/gtk-vnc-0.4.4.ebuild net-libs/gtk-vnc/gtk-vnc-0.5.0-r1.ebuild net-libs/gtk-vnc/gtk-vnc-0.5.0.ebuild net-misc/spice-gtk/spice-gtk-0.11.ebuild net-misc/spice-gtk/spice-gtk-0.12.ebuild net-misc/spice-gtk/spice-gtk-0.7.159.ebuild net-misc/spice-gtk/spice-gtk-0.8.ebuild net-p2p/eiskaltdcpp/eiskaltdcpp-2.2.6.ebuild net-p2p/eiskaltdcpp/eiskaltdcpp-2.2.7.ebuild net-p2p/eiskaltdcpp/eiskaltdcpp-9999.ebuild sci-mathematics/gretl/gretl-1.9.7.ebuild sci-mathematics/gretl/gretl-1.9.8.ebuild www-client/dwb/dwb-2012.02.01.ebuild www-client/dwb/dwb-2012.05.11.ebuild www-client/dwb/dwb-9999.ebuild www-client/opera/opera-11.64.1403.ebuild www-client/opera/opera-12.00.1448.ebuild www-client/opera/opera-12.00.1450.ebuild www-client/opera-next/opera-next-12.00.1440.ebuild www-client/opera-next/opera-next-12.00.1441.ebuild www-client/opera-next/opera-next-12.00.1445.ebuild www-client/opera-next/opera-next-12.00.1448.ebuild www-client/opera-next/opera-next-12.00.1450.ebuild www-client/uget/uget-1.8.0.ebuild www-client/uget/uget-9999.ebuild www-client/uzbl/uzbl-2011.07.17.ebuild www-client/uzbl/uzbl-2011.07.25.ebuild www-client/uzbl/uzbl-2011.10.01.ebuild www-client/uzbl/uzbl-2011.11.28.ebuild www-client/uzbl/uzbl-9999.ebuild x11-themes/light-themes/light-themes-0.1.8.29.ebuild x11-themes/light-themes/light-themes-0.1.8.32.ebuild x11-themes/light-themes/light-themes-0.1.9.1.ebuild
