Browser Caching problems
Sometimes after an update has been completed on your website, you may not see it. One of the main problems is because of your Browsers cache. The cache keeps websites you have already visited so that they load faster next time you visit them. The easiest way to make sure you are not looking at a cached webpage is to clear your browsers cache:
IE
Go to the Tools > Internet Options item in the menu Inside Temporary Internet Files, click on the 'Delete Files' button
IE7
Go to the Tools > Delete Browsing History item in the menu Click on the 'Delete Files' button
Firefox 2 & 3
Go to the Tools > Clear Private Data item in the menu Make sure only 'Cache' has a tick next to it, and click on the 'Clear Private Data Now' button
Safari 2 (Mac)
Go to the Safari > Empty Cache item in the menu