Came across this on a Debian Wheezy deployment, so I guess it's new PHP 5.4 fastidiousness:

Strict warning: Declaration of micro_views_handler_relationship_micro::options_validate() should be compatible with views_handler::options_validate(&$form, &$form_state) in _registry_check_code() (line 3035 of /var/www/drupal/includes/bootstrap.inc).