#160043 by chx: array_filter for book admin settings form, which is required based on http://lists.drupal.org/pipermail/development/2006-September/019917.html
#160043 by chx: array_filter for book admin settings form, which is required based on http://lists.drupal.org/pipermail/development/2006-September/019917.html

brainhell/drupalglass,joshkoenig/golden-god-demo,edutrul/social-web,brainhell/drupalglass,joshkoenig/golden-god-demo,edutrul/social-web,rmcveigh/frontend-dev,brainhell/drupalglass,joshkoenig/golden-god-demo,edutrul/social-web,lincgr/Prueba,brainhell/drupalglass,lincgr/Prueba,joshkoenig/golden-god-demo,joshkoenig/golden-god-demo,rmcveigh/frontend-dev,edutrul/social-web,edutrul/social-web,OccupyWallStreet/streetnet,OccupyWallStreet/streetnet,joshkoenig/golden-god-demo,rmcveigh/frontend-dev,OccupyWallStreet/streetnet,lincgr/Prueba,OccupyWallStreet/streetnet,joshkoenig/golden-god-demo,brainhell/drupalglass,lincgr/Prueba