The GNOME Themes Standard project, a collection of the default GNOME 3 themes (Adwaita and some accessibility themes), has just reached version 3.7.90, along with most other packages in the GNOME project.
GNOME Themes Standard 3.7.90 is betting closer to the 3.8 stable release and it only brings a couple of enhancements and fixes.
Highlights of GNOME Themes Standard 3.7.90:
• Support for the styling of the header bar widgets has been added;
• Support for OSD buttons in a GtkOverlay has been added;
• The style for pressed OSD buttons has been improved;
• The gedit search slider CSS has been updated;
• A new style has been added for the Contacts' selection toolbar.
Check out the changelog for a complete list of fixes and new features.
Download GNOME Themes Standard 3.7.90 right now from Softpedia. Remember that this is a development version and it should NOT be installed on production machines. It is intended for testing purposes only.