helpful articles and how-to's
Your web browser uses a cache of pictures and other content when returning to a page you've visited already. It does this to help speed up browsing on the assumption that the remote website hasn't changed since you're last visit.
First rule regarding browser cache is if at first you don't see the latest updated version of a web page as you expect to see it, refresh the page. If you still don't see the update after a refresh, refresh the page again. If after 2 refreshes, you're browser still hasn't cleared out it's local cache of the page, you can follow the steps for your particular web browser to clear it's browser cache.