Hi. I install new PHPBB Forum 3.0 Beta. 
Today this is the most contemporary forum in the world.
But I must note that “phpbb_sessions” table structure is changed.
I made some changes for these variables in sessions.php
$url_register = $url_app."ucp.php?mode=register";
$url_lost_password = $url_app."ucp.php?mode=sendpassword";
$url_control_panel = $url_app."ucp.php?mode=editprofile";
$url_mailform = $url_app."ucp.php?mode=email&u={user_id}";
$url_show_profile = $url_app."ucp.php?mode=viewprofile&u={user_id}";
$url_login = $url_app."ucp.php?mode=login";
$url_logout = $url_app."ucp.php?mode=login?logout=true";
sessions.php needs some modification, when it create or update session data in "phpbb_sessions table". 
//
// Create or update the session
//
$sql = "UPDATE " . SESSIONS_TABLE . "
SET session_user_id = $user_id, session_start = $this->current_time, session_time = $this->current_time, session_page = $page_id, session_logged_in = $login
WHERE session_id = '" . $this->session_id . "'
AND session_ip = '$user_ip'";
if ( !$site_db->query($sql) || !$site_db->affected_rows() )
{
$this->session_id = md5(uniqid($user_ip));
$sql = "INSERT INTO " . SESSIONS_TABLE . "
(session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in)
VALUES ('$this->session_id', $user_id, $this->current_time, $this->current_time, '$user_ip', $page_id, $login)";
$site_db->query($sql);
}
If someone can help with this problem it will be grate!!! For many users this Mod is very necessary.I’m using 4image Gallery 1.72 + Modes and PHPBB 3.0 Beta2. I tried to correct it itself, but it did not come out. Please, help someone!!! 
