GTK3 Theme parsing error in gtk-widgets.css of Albatross theme

Ubuntu 14.04 LTS
shimmer-themes: 1.7.3-0ubuntu1

When using the Albatross gtk3 themeUbuntu 14.04 LTS and starting a program like gedit from the terminal you get this warning:

Gtk-WARNING **: Theme parsing error: gtk-widgets.css:2769:41: Expected a valid selector

This is caused by an superfluous comma in line 2769 of gtk-widgets.css.

Removing this comma solves the problem.

--- gtk-widgets.css 2014-03-26 13:46:28.000000000 +0100
+++ gtk-widgets.cssnew 2014-05-01 13:51:36.719123877 +0200
@@ -2766,7 +2766,7 @@
 .header-bar .raised.linked .button:insensitive,
 .header-bar .linked .button,
 .header-bar .linked .button:active,
-.header-bar .linked .button:insensitive, {
+.header-bar .linked .button:insensitive {
     border-width: 1px;
     border-radius: 0;
     border-right-width: 0;