This documentation is not using the current rendering mechanism and is probably outdated. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.

Server Configuration

Internet Explorer has caching problems that may affect the performance of the htmlArea RTE. These problems may be worked around with the following server configuration recommendations.

Apache configuration:

Add the following lines to your Apache httpd.conf file or in the .htaccess file of the root directory of your site:

BrowserMatch "MSIE" brokenvary=1
BrowserMatch "Mozilla/4.[0-9]{2}" brokenvary=1
BrowserMatch "Opera" !brokenvary
SetEnvIf brokenvary 1 force-no-vary

ExpiresActive On
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/png "access plus 1 month"

The last two statements require the mod_expires Apache module to be installed. For information on this module, see:

More information:

For more information on this subject, see the following articles:

See also the Troubleshooting section of the present document for information on IE caching problems in relation with the Apache mod_gzip module.