Description of problem:
keybinder provides a Gtk3 flavor which is not packaged yet. Since there are two tarballs, keybinder-3.0 should be submitted as a new package, since you already maintain the Gtk2 flavor, it makes sens that you also maintain this one too.
If you're ok with that, feel free to ask me for reviewing the new package (after all, i'm the one who suggested it ;) ).

https://github.com/engla/keybinder