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If you copied code from the aberdeen_breadcrumb function into a custom sub-theme's template.php file you should compare your code to the changes to ensure that menu_get_active_title() is properly wrapped in check plain like:
Small bugfix release: we now give write access to the files/ and private/ directories to the webserver through ACLs so that files uploaded by third parties (SFTP or SSH users) are still writable by the webserver.