How do I empty the Drupal caches:
I have the easiest solution for that. Install admin_menu module (actually not only for this purpose, once you have installed this module, you wont regret it for sure, link: http://drupal.org/project/admin_menu). Ok, then on a newly appeared top dropdown menu hover your favicon and dropdown menu will appear, and you will see: Flush all caches menu. One click - one flush. Moreover you can flush all caches together or select what to flush: Pages, menu, themes etc. Try and you will never go back )