User blog comment:TOR/Caching Explained/@comment-227438-20130328154130

Two things. First, a tip: on most browsers, pressing CTRL+F5 instead of just F5 or the refresh button will bypass the cache when refreshing a web page. This provides an easy and fast way to force-refresh most pages without going through the trouble of clearing your whole browser cache.

Second, this statement is false: "We know that the content of a page stays the same until somebody makes an edit". The content of a page directly typed into the page stays the same, sure; but the content of the page brought in from external areas does NOT necessarily stay the same. And this causes problems. Somebody already mentioned site CSS and javascript. This content, or parts of it, is inserted into each page viewed. When the CSS or javascript changes, EVERY page on the wiki now ought to be refreshed, but instead you get the cached version with the old CSS/javascript. This makes it very difficult to develop or debug such scripts. Sometimes I've noticed templates suffering the same problem, but not every time. I'm not sure how this is handled under the hood.