Hi all I think that the behaviour of $r->no_cache(1) is buggy, when combined with mod_expires.
I have: ExpiresDefault "access plus 1 month" ExpiresActive On then in my mod_perl code, I call $r->no_cache(1) The headers that are returned are: Pragma: no-cache Cache-control: no-cache, max-age=864000 Expires: Sat, 05 Dec 2009 16:08:53 GMT Firefox doesn't cache this page, but IE6 - 8 does. If I explicitly set the headers: $headers->set( 'Pragma', 'no-cache' ); $headers->set( 'Cache-control', 'no-cache' ); $headers->set( 'Expires', -1 ); then I get: Pragma: no-cache Cache-control: no-cache Expires: -1 which works across all browsers. Could the behaviour of no_cache() be changed to do this instead? thanks Clint