kamoso-2.0.2-alt7.M70P.1.x86_64 desktop-exec-fill-code warn kamoso.desktop: found MimeType= entry, but to handle it properly you have to declare one of %f,%F,%u,%U in Exec= entry. Note that %m is deprecated. See http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-1.0.html#exec-variables;