Type in a shell "zenity --list --column test close" Choose "close" and click "ok". You get "close" this is the right behavior. Double klick on "close". You get "close|close" that is wrong. I'm not sure if it is the right URL but on git the bug seems to be fixed: https://git.gnome.org/browse/zenity/commit/?id=7c234ed9b71d5f009abff509ef2bf576f61a0cbb
+*zenity-3.8.0-r1 (24 Dec 2013) + + 24 Dec 2013; Pacho Ramos <pacho@gentoo.org> + +files/zenity-3.8.0-double-click.patch, +zenity-3.8.0-r1.ebuild, + -zenity-3.6.0.ebuild: + Fix double clicking an item or hitting enter after selecting an item (#493332 + by Kai Wustermann), drop old. +