Disable Safari® Cache
Cache is small temporary files that are created during a browsing session. These small temporary files tend to get accumulated as the browser is used over a period of time and some users prefer to have cache disabled. Cache of your Safari browser can be disabled adversely affecting the overall browsing experience, but it would enhance the security. If some websites that are known to cause problems have to be viewed, it is advisable that Safari cache is disabled.
To know more about disabling cache in various versions of Safari, click on the links below:
More about Disabling Cache in Safari 3
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More about Disabling Cache in Safari 5