Change in settings.yml the line(s) for error_reporting:
error_reporting: <?php echo ((E_ALL | E_STRICT) ^ E_DEPRECATED)."\n" ?>
If you develop your apps on a machine with PHP 5.3 but the production server has PHP 5.2.x you can replace the error_reporting line by this:
error_reporting: <?php echo ((version_compare(PHP_VERSION, '5.3.0', '<')) ? ((E_ALL | E_STRICT)) : ((E_ALL | E_STRICT) ^ E_DEPRECATED) )."\n" ?>
To disable the date-warning
Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CEST/2.0/DST' instead in /........../symfony/svn/1.2/lib/config/sfRootConfigHandler.class.php on line 91
add the command in ProjectConfiguration.class
date_default_timezone_set('UTC');