error in /usr/share/themes/Adwaita/gtk-2.0/gtkrc

When I start any GTK program, I get thew following error:

/usr/share/themes/Adwaita/gtk-2.0/gtkrc:1163: error: unexpected identifier `direction', expected character `}'

framstag@diaspora:~: dpkg -S /usr/share/themes/Adwaita/gtk-2.0/gtkrc
gnome-themes-standard-data: /usr/share/themes/Adwaita/gtk-2.0/gtkrc

framstag@diaspora:~: lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gnome-themes-standard-data 3.18.0-2ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-43.63-generic 4.4.21
Uname: Linux 4.4.0-43-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Wed Oct 19 13:00:42 2016
PackageArchitecture: all
SourcePackage: gnome-themes-standard
UpgradeStatus: No upgrade log present (probably fresh install)