Sorry about that... i rechecked and it was an error in my numbering the lines in my post... it does actuall read as you said it should.
277. $auth_user['auth_mod'] = ( $userdata ['session_logged_in'] ) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access, $is_admin) : 0;
281. for($k = 0; $k < count($f_access); $k++)
283. $f_forum_id = $f_access[$k]['forum_id'];
285. $auth_user[$f_forum_id]['auth_mod'] = 288. ( $userdata['session_logged_in'] ) ? auth_check_user (AUTH_MOD, 'auth_mod', $u_access[$f_forum_id], $is_admin) : 0;
still getting the same errors though and I havent changed anything myself...
Is anyone willing to email a known working copy of auth.php from v2.0.0Gold that I can upload - to check if it is the uploading process that is going wrong???