New Posts problem?

Hello, not clear the situation, because the plugin run only on WP and nothing can affect posts or threads into phpBB.

I then go back to the forum and look at new Posts again. They’ve all gone!

which posts? to be moderated?
all posts? it maybe depend on user permissions, so in effect, you say ‘it is a cookie problem’ because after you result logged out?

To correctly set cookie, check that on phpBB ACP the cookie setting as on procedure contain something like
.mysite.com

so open wp_w3all.php file, +- on top of file you’ll find this code:

// Force here the reset of cookie domain  
// $w3reset_cookie_domain = ''; // change to your domain to RESET/force cookie domain: remove // chars, save, and than load any WP page one time on browser. So comment out other time here re-adding // chars and save.

change on this code the line
// $w3reset_cookie_domain = '';
into this (change to match your domain name, and remove // in front of the line):
$w3reset_cookie_domain = '.mysite.com';

the code detect the correct cookie setting from 1.7.0 but can fail (in reality not fail, but your site could be hosted as subdomain into a hosting provider (like mysite.myhosting.com, where you NOT own myhosting.com, but only mysite) … well this is a complex argument for my bad eng … hope +- it is clear …