persistent cache problem in admin

[mvlcek]

So I scanned for mentions of cache and ran into this when I changed a bit of text, left the page, and went back to it:

Code:

...
HTTP/1.1 304 Not Modified
...
Expires: Sun, 29 Jul 2012 07:41:26 GMT
Cache-Control: max-age=86400

You should never get one of the above response headers with a PHP file.

Possible reasons:

• You might have some some cache statements in your .htaccess file -> delete them
  
• You use a fancy URL ending in .htm or .html, causing apache to cache by default -> you can probably overwrite this in your .htaccess
  
• Your provider uses weird default cache settings -> you can probably overwrite this in your .htaccess
  

Try adding the following to the beginning of your .htaccess to prevent caching:

Code:

<FilesMatch "\.(php|html|html)$">
        ExpiresDefault A0
        Header set Cache-Control "no-cache, no-store, must-revalidate, max-age=0, proxy-revalidate, no-transform"
        Header set Pragma "no-cache"
    </FilesMatch>

(copied from http://blog.splash.de/2010/01/29/cache-k...-htaccess/)