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Mandatory information about my setup:

Have I read the related troubleshooter articles above before posting (which pages?)? Yes
Have I searched the tickets before posting? Yes
Have I read the documentation before posting (which pages?)? Yes
Joomla! version: 2.5.9
PHP version: 5.3
MySQL version: (unknown)
Host: (optional, but it helps us help you)
Admin Tools version: latetst

Description of my issue:

HI, i'm trying to set some directives in the .htaccess file in my joomla websites to control the caching of files. I added thes lines to the .htaccess file, but ran into the same problem I had before with the Admin Tools option "Set default expiration time to 1 hour" This was in ticket #12690.

You mentioned:
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Thank you for the site access! It seems that the "Set default expiration time to 1 hour" option is not compatible with your server. It causes the server to tell the browser to cache the edit links, despite Joomla! sending proper non-cache HTTP headers, triggering the session issue. Just keep that option disabled in .htaccess Maker and you'll be fine.
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Could you tell me what I could to to make my server compatible with this option?

With regards,
Jip.

Hi Nicolas,

Thanks for our reply.

I believe I do have mod_expire installed and working. When I add this to .htaccess it seems to work fine:
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<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access plus 60 days"
ExpiresByType image/png "access plus 60 days"
ExpiresByType image/gif "access plus 60 days"
ExpiresByType image/jpeg "access plus 60 days"
ExpiresByType text/css "access plus 1 month"
ExpiresByType image/x-icon "access plus 1 month"
ExpiresByType application/pdf "access plus 1 month"
ExpiresByType audio/x-wav "access plus 1 month"
ExpiresByType audio/mpeg "access plus 1 month"
ExpiresByType video/mpeg "access plus 1 month"
ExpiresByType video/mp4 "access plus 1 month"
ExpiresByType video/quicktime "access plus 1 month"
ExpiresByType video/x-ms-wmv "access plus 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType text/javascript "access plus 1 week"
ExpiresByType application/x-javascript "access plus 1 week"
ExpiresByType application/javascript "access plus 1 week"
</IfModule>
++++++++++++++++++++++

Except when I add add a default expire like this:

ExpiresDefault "access plus 2 days"

it seems that Joomla get 'confused'. After opening (edit link) an article two times, the third time result in an error message: "You are not permitted to use that link to directly access that page (#15).".

Same thing happens with the Admin Tools option 'Set default expiration time to 1 hour'. I guess this option is also adding a default expire to .htaccess.

The other ExpiresByTime lines work, because I can test this in ySlow or with Pingdome Tools. So I guess mod_expires is working. (Apache 2.2.24)

I could just leave out the default, but I would rather know why this is not working ;-) Not very urgent though...