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Lt. Commander
Join Date: Dec 2007
Posts: 120
# 14
01-12-2012, 08:28 PM
The problem is you put new resources at the old location and so the browsers still had the old resources cached. There is a way to prevent this problem 100% of the time so there are no issues. If you change an image, css, js or any other resource file give it a new url that you have not used before.

What I suggest is putting a version number in a url and setting it to cache forever. That way your website always works for people, you never run into outdated cache versions and the pages run insanely faster.

I have taken some websites from 10 seconds load times to .5 seconds just doing this kind of stuff.