title: sprites - cache issue - especially on chrome
body: <p>I have the following problem.</p>
  
  <p>We have a site. I changed some sprites to make it look cooler. The thing is that we already have users and there is a big chance that their browser have the old images cached. Is there anyway to force a new request to images from them?</p>
  
  <p>Note: On firefox (default settings) after some refreshes the new sprites are requested but seems like chrome (default settings) just doesn't request them unless you explicitly clear cache.</p>
  
  <p>Another Note: One way would be to rename the sprites but this also means that we have to find them in css files and rename there also, etc. etc. etc.</p>
  
  <p>Have a great day and ty for help.</p>