It should only list forums that a user has read access in:
Code
	// Based upon user's permissions, build a list of allowable forums
	$boards = array();
	foreach($tree['active'] as $k => $v) {
		if ($userob->check_access("forum","READ_TOPICS",$k)) {
			$boards[] = $k;
		}
	}
	$board_in = join(",",$boards);

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