When changes are made to websites on ROHAN, it can take an hour for the modifications to show up on a refresh of the browser page. The reason is caching.
ROHAN sets expiration flags so HTML pages are cached 1 hour, and images for 1 week by the browser viewing the page. ROHAN's web server also keeps an internal memory cache of frequently served static objects. The server cache is refreshed every hour.
You can force the cache (both browser and web server) to update immediately by clicking reload in Firefox. Some browsers don't update cached items unless the SHIFT key is held down while clicking reload. NOTE: IE version 8 only refreshes it's cache if you hold down the CTRL key and click reload. SHIFT reload does not refresh in IE version 8.
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