mutt-1.4.2.3-alt7.x86_64	freedesktop-desktop	warn	desktop-file-validate utility exited abnormally with the following message(s): /usr/share/applications/mutt.desktop: error: value "Network;Mail;News;ConsoleOnly;" for key "Categories" in group "Desktop Entry" contains an unregistered value "Mail"; values extending the format should start with "X-";