How to clear your internet browser's cache.

In order to speed up web browsing, web browsers are designed to download web pages and store them locally on your machine in an area called the "cache". When you visit the same page for a second time, the browser speeds up display time by loading the page locally from its cache instead of downloading everything again. This sometimes results in less than current versions of web pages being displayed. If you believe that you have a less than current version of a page, please follow the following steps to clear the cache in your particular browser.

Although it's not required by all browsers, restarting your browser after clearing the cache is a good idea. If you're using Explorer 4.x or Explorer 5.x it's better to restart the computer as well.

AOL 3 (with Explorer 3):
1. Select "Members | Preferences" from the main menu
2. Click on the "WWW" button
3. Click on "Advanced..."
4. Click on "Purge Cache" to clear the cache

Explorer 3.
1. Select "View | Options..." from the main menu
2. Change to the "Advanced" tab
3. Click on "Settings" button
4. Click on "Empty Folder..."


Explorer 4
1. Select "View | Internet Options..." from the main menu
2. Change to the "General" tab
3. Click on "Delete Files" button


Explorer 5
1. Select "Tools | Internet Options..." from the main menu
2. Change to the "General" tab
3. Click on "Delete Files" button


Explorer 6
1. Click the 'Tools' menu at the top of the browser.
2. Select 'Internet Options'.
2. Click the 'General' tab.
4. In the Temporary Internet Files section, click the 'Delete Files' button.
3. Click OK, and then click OK again.

To reload a page and bypass the cache:
Press F5.
or
Click the Reload button on the toolbar.

To completely clear the cache:
1. From the 'Settings' menu, select 'Configure Konqueror'.
2. Scroll down to select the icon labelled 'Cache'
3. Click the button labelled 'Clear Cache'.

This includes Firefox, Netscape Navigator (versions 6.x and 7.x) and SeaMonkey.
To reload a page and bypass the cache:
PC: Hold down the Control and Shift keys, and press R.
Mac: Hold down the Command and Shift keys, and press R.
or:
Hold down the Shift key, and click the Reload button on the navigation toolbar.

To completely clear the cache:
1. From the 'Edit' or 'Tools' menu, choose 'Preferences' or 'Options'.
2. Expand the 'Advanced' options and choose 'Cache' or 'Privacy'.
3. Click the button called 'Clear Cache'.
4. Click 'OK'.

For older versions of Mozilla Firefox:
1. Click 'Tools', then 'Options' and click on 'Privacy' (picture of a key) in the sidebar of the window that pops up.
2. Click the 'Clear' button that is next to the word 'Cache'.

Opera does not appear to have an option to forcibly bypass the cache, but you can clear it.

To completely clear the cache :
1. From the 'Tools' menu, choose 'Preferences'.
2. Expand the 'Advanced' options and choose 'History'.
3. Click the button called 'Empty now'.

http://en.wikipedia.org/wiki/Wikipedia:Bypass_your_cache
http://www.mnot.net/cache_docs/