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Wijzig regel 201 in libraries/joomla/environment/response.php
JResponse::setHeader( ‘Cache-Control’, ‘no-store, no-cache, must-revalidate, post-check=0, pre-check=0’, false );

naar:
JResponse::setHeader( ‘Cache-Control’, ‘no-store, no-cache, must-revalidate’, true ); // Extra CYA
JResponse::setHeader( ‘Cache-Control’, ‘post-check=0, pre-check=0’, false ); // HTTP/1.1

Edit:
//JResponse::setHeader( ‘Cache-Control’, ‘no-store, no-cache, must-revalidate, post-check=0, pre-check=0’, false );//
JResponse::setHeader( ‘Cache-Control’, ‘no-store, no-cache, must-revalidate’, true ); // Extra CYA
JResponse::setHeader( ‘Cache-Control’, ‘post-check=0, pre-check=0’, false ); // HTTP/1.1

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