Version 1.28 fixes an issue where scripts added with Drupal behaviors would run twice, as well as some other minor issues. It’s highly recommended to update if you are using version 1.26 or 1.27.
Issue #3038237 by Spokje, svenryen, danyg, SaschaHannes, toddses, benqwerty, millerrs, dolu, agileadam: jQuery scripts in Drupal.attachBehaviors() are being run twice
Issue #3000183 by lamp5: Notice: Undefined index: #theme in eu_cookie_compliance_page_alter()
Issue #2993312 by JoshaHubbers: Table exists in update hook 7006 breaks updb
Issue #3009862 by svenryen, izmeez: Wrong file permissions in 7.x-1.x-dev