Hi guys this is my first post, and I hope it's in the right place This is not the script I was running when I detected this anomaly, but to keep it simple I'll use this straight from the PHP manual: session_start(); if (!isset($_SESSION['count'])) { $_SESSION['count'] = 0; } else { $_SESSION['count']++; } PHP: Opera (tested 9.25 and 9.50b) only registers session count if the page is re-visited by either direct typing into the address bar or with href. Does not register with history.back or .go(-x) or with browser history functions (button/mouse/keyboard) Might also add that header cache control and page expiry control have no effect. (in any case if you have to add these to get Opera to behave - it still fails because you shouldn't have to resort to this) All other browsers tested behave as expected (IE 6+, Firefox 2+, Safari 3+, and NN9) Has anyone else experienced this? Am I missing something? I have asked about this in the Opera Forum - even set up a demo on our site - so far no takers. Any thoughts would be appreciated ... Thanks