diff --git a/upgrade/r571-dl_upgrade.php b/upgrade/r571-dl_upgrade.php
new file mode 100644
index 000000000..daf4a9999
--- /dev/null
+++ b/upgrade/r571-dl_upgrade.php
@@ -0,0 +1,57 @@
+<?php
+
+define('IN_FORUM', true);
+define('BB_ROOT', './');
+require(BB_ROOT .'common.php');
+
+$user->session_start();
+
+set_die_append_msg();
+if (!IS_SUPER_ADMIN) bb_die($lang['ONLY_FOR_SUPER_ADMIN']);
+
+$confirm = request_var('confirm', '');
+
+if ($confirm)
+{
+	DB()->query("
+		CREATE TEMPORARY TABLE tmp_buf_dlstatus (
+			user_id      mediumint(9)          NOT NULL default '0',
+			topic_id     mediumint(8) unsigned NOT NULL default '0',
+			user_status  tinyint(1)            NOT NULL default '0',
+			PRIMARY KEY (user_id, topic_id)
+		) ENGINE = MyISAM
+	");
+
+	DB()->query("
+		INSERT INTO tmp_buf_dlstatus
+			(user_id, topic_id, user_status)
+		SELECT
+			user_id, topic_id, user_status
+		FROM bb_bt_dlstatus_new
+	");
+
+	DB()->query("
+		REPLACE INTO bb_bt_dlstatus_main
+			(user_id, topic_id, user_status)
+		SELECT
+			user_id, topic_id, user_status
+		FROM tmp_buf_dlstatus
+	");
+
+	DB()->query("DROP TEMPORARY TABLE IF EXISTS tmp_buf_dlstatus");
+	DB()->query("RENAME TABLE bb_bt_dlstatus_main TO bb_bt_dlstatus");
+
+	DB()->query("DROP TABLE IF EXISTS bb_bt_dlstatus_mrg");
+	DB()->query("DROP TABLE IF EXISTS bb_bt_dlstatus_new");
+
+	bb_die('<h1 style="color: green">База данных обновлена</h1>');
+}
+else
+{
+	$msg = '<form method="POST">';
+	$msg .= '<h1 style="color: red">!!! Перед тем как нажать на кнопку, сделайте бекап базы данных !!!</h1><br />';
+	$msg .= '<input type="submit" name="confirm" value="Начать обновление Базы Данных (R571)" style="height: 30px; font:bold 14px Arial, Helvetica, sans-serif;" />';
+	$msg .= '</form>';
+
+	bb_die($msg);
+}
\ No newline at end of file
diff --git a/upload/admin/admin_user_search.php b/upload/admin/admin_user_search.php
index e087a2d2b..a2d226b32 100644
--- a/upload/admin/admin_user_search.php
+++ b/upload/admin/admin_user_search.php
@@ -1232,7 +1232,10 @@ else
 	{
 		$pagination .= ( $pagination == '' ) ? '<a href="'.$base_url.'&sort='.$sort.'&order='.$order.'&page='. ($page + 1) .'">'.$lang['NEXT'].'</a>' : ' | <a href="'.$base_url.'&sort='.$sort.'&order='.$order.'&page='. ($page + 1) .'">'.$lang['NEXT'].'</a>';
 	}
-
+	if ($num_pages > 2)
+	{
+		$pagination .= '&nbsp;&nbsp;<input type="text" name="page" maxlength="5" size="2" class="post" />&nbsp;<input type="submit" name="submit" value="'.$lang['GO'].'" class="post" />';
+	}
 	$template->assign_vars(array(
 		'TPL_ADMIN_USER_SEARCH_RESULTS' => true,
 
diff --git a/upload/common.php b/upload/common.php
index 8a38ee5e3..846880951 100644
--- a/upload/common.php
+++ b/upload/common.php
@@ -1995,7 +1995,7 @@ function mkdir_rec ($path, $mode)
 
 function verify_id ($id, $length)
 {
-	return (preg_match('#^[a-zA-Z0-9]{'. $length .'}$#', $id) && is_string($id));
+	return (is_string($id) && preg_match('#^[a-zA-Z0-9]{'. $length .'}$#', $id));
 }
 
 function clean_filename ($fname)
@@ -2004,45 +2004,33 @@ function clean_filename ($fname)
 	return str_replace($s, '_', str_compact($fname));
 }
 
-function encode_ip ($dotquad_ip)
+function encode_ip ($ip)
 {
-	$ip_sep = explode('.', $dotquad_ip);
-	if (count($ip_sep) == 4)
-	{
-		return sprintf('%02x%02x%02x%02x', $ip_sep[0], $ip_sep[1], $ip_sep[2], $ip_sep[3]);
-	}
-
-	$ip_sep = explode(':', preg_replace('/(^:)|(:$)/', '', $dotquad_ip));
-	$res = '';
-	foreach ($ip_sep as $x)
-	{
-		$res .= sprintf('%0'. ($x == '' ? (9 - count($ip_sep)) * 4 : 4) .'s', $x);
-	}
-	return $res;
+	$d = explode('.', $ip);
+	return sprintf('%02x%02x%02x%02x', $d[0], $d[1], $d[2], $d[3]);
 }
 
-function decode_ip ($int_ip)
+function decode_ip ($ip)
 {
-	$int_ip = trim($int_ip);
+	return long2ip("0x{$ip}");
+}
 
-	if (strlen($int_ip) == 32)
-	{
-		$int_ip = substr(chunk_split($int_ip, 4, ':'), 0, 39);
-		$int_ip = ':'. implode(':', array_map("hexhex", explode(':',$int_ip))) .':';
-		preg_match_all("/(:0)+/", $int_ip, $zeros);
-		if (count($zeros[0]) > 0)
-		{
-			$match = '';
-			foreach($zeros[0] as $zero)
-				if (strlen($zero) > strlen($match))
-					$match = $zero;
-			$int_ip = preg_replace('/'. $match .'/', ':', $int_ip, 1);
-		}
-		return preg_replace('/(^:([^:]))|(([^:]):$)/', '$2$4', $int_ip);
-	}
-	if (strlen($int_ip) !== 8) $int_ip = '00000000';
-	$hexipbang = explode('.', chunk_split($int_ip, 2, '.'));
-	return hexdec($hexipbang[0]). '.' . hexdec($hexipbang[1]) . '.' . hexdec($hexipbang[2]) . '.' . hexdec($hexipbang[3]);
+function ip2int ($ip)
+{
+	return (float) sprintf('%u', ip2long($ip));  // для совместимости с 32 битными системами
+}
+
+// long2ip( mask_ip_int(ip2int('1.2.3.4'), 24) ) = '1.2.3.255'
+function mask_ip_int ($ip, $mask)
+{
+	$ip_int = is_numeric($ip) ? $ip : ip2int($ip);
+	$ip_masked = $ip_int | ((1 << (32 - $mask)) - 1);
+	return (float) sprintf('%u', $ip_masked);
+}
+
+function bb_crc32 ($str)
+{
+	return (float) sprintf('%u', crc32($str));
 }
 
 function hexhex ($value)
@@ -2174,21 +2162,7 @@ function hide_bb_path ($path)
 function tr_drop_request ($drop_type)
 {
 	if (DBG_LOG) dbg_log(' ', "request-dropped-$drop_type");
-	dummy_exit(mt_rand(300, 900));
-}
-
-function get_loadavg ()
-{
-	if (is_callable('sys_getloadavg'))
-	{
-		$loadavg = join(' ', sys_getloadavg());
-	}
-	else if (strpos(PHP_OS, 'Linux') !== false)
-	{
-		$loadavg = @file_get_contents('/proc/loadavg');
-	}
-
-	return !empty($loadavg) ? $loadavg : 0;
+	dummy_exit(mt_rand(60, 600));
 }
 
 function sys ($param)
@@ -2277,7 +2251,7 @@ else if (defined('IN_TRACKER'))
 		// Exit if tracker is disabled via ON/OFF trigger
 		if (file_exists(BB_DISABLED))
 		{
-			dummy_exit(mt_rand(1200, 2400));  #  die('d14:failure reason20:temporarily disablede');
+			dummy_exit(mt_rand(60, 2400));  #  die('d14:failure reason20:temporarily disablede');
 		}
 	}
 }
\ No newline at end of file
diff --git a/upload/config.php b/upload/config.php
index e5cadecbb..f5eac042d 100644
--- a/upload/config.php
+++ b/upload/config.php
@@ -56,7 +56,7 @@ $domain_name = (!empty($_SERVER['SERVER_NAME'])) ? $_SERVER['SERVER_NAME'] : $do
 // Increase number of revision after update
 $bb_cfg['tp_version'] = '2.5 (unstable)';
 $bb_cfg['tp_release_date'] = '30-01-2014';
-$bb_cfg['tp_release_state'] = 'R573';
+$bb_cfg['tp_release_state'] = 'R574';
 
 // Database
 $charset  = 'utf8';
@@ -475,10 +475,10 @@ $bb_cfg['max_smilies']           = 10;             // Максимальное 
 // PM
 $bb_cfg['privmsg_disable']      = false;           // отключить систему личных сообщений на форуме
 $bb_cfg['max_outgoing_pm_cnt']  = 10;              // ограничение на кол. одновременных исходящих лс (для замедления рассылки спама)
-$bb_cfg['max_inbox_privmsgs']   = 200;
-$bb_cfg['max_savebox_privmsgs'] = 20;
-$bb_cfg['max_sentbox_privmsgs'] = 50;
-$bb_cfg['pm_days_keep']         = 180;               // время хранения ЛС
+$bb_cfg['max_inbox_privmsgs']   = 200;             // максимальное число сообщений в папке входящие
+$bb_cfg['max_savebox_privmsgs'] = 25;              // максимальное число сообщений в папке сохраненные
+$bb_cfg['max_sentbox_privmsgs'] = 50;              // максимальное число сообщений в папке отправленные
+$bb_cfg['pm_days_keep']         = 180;             // время хранения ЛС
 
 // Actions log
 $bb_cfg['log_days_keep'] = 90;
@@ -509,7 +509,6 @@ $bb_cfg['ad_blocks'] = array(
 );
 
 // Misc
-define('LOADAVG',   function_exists('get_loadavg') ? get_loadavg() : 0);
 define('MEM_USAGE', function_exists('memory_get_usage'));
 
 $bb_cfg['mem_on_start'] = (MEM_USAGE) ? memory_get_usage() : 0;
diff --git a/upload/includes/cron/cron_run.php b/upload/includes/cron/cron_run.php
index e1f059deb..116b143f5 100644
--- a/upload/includes/cron/cron_run.php
+++ b/upload/includes/cron/cron_run.php
@@ -48,7 +48,6 @@ foreach ($cron_jobs as $job)
 			$msg[] = 'start';
 			$msg[] = date('m-d');
 			$msg[] = date('H:i:s');
-			$msg[] = sprintf('%-4s', round(get_loadavg(), 1));
 			$msg[] = sprintf('%05d', getmypid());
 			$msg[] = $job['cron_title'];
 			$msg = join(LOG_SEPR, $msg);
@@ -75,7 +74,6 @@ foreach ($cron_jobs as $job)
 			$msg[] = '  end';
 			$msg[] = date('m-d');
 			$msg[] = date('H:i:s');
-			$msg[] = sprintf('%-4s', round(get_loadavg(), 1));
 			$msg[] = sprintf('%05d', getmypid());
 			$msg[] = round(utime() - $cron_start_time) .'/'. round(utime() - TIMESTART) . ' sec';
 			$msg = join(LOG_SEPR, $msg);
diff --git a/upload/includes/functions.php b/upload/includes/functions.php
index a5f8c163c..f0d6f34a4 100644
--- a/upload/includes/functions.php
+++ b/upload/includes/functions.php
@@ -1916,10 +1916,6 @@ function message_die ($msg_code, $msg_text = '', $msg_title = '', $err_line = ''
 			if (!$msg_title) $msg_title = $lang['INFORMATION'];
 			break;
 
-		case CRITICAL_MESSAGE:
-			if (!$msg_title) $msg_title = $lang['CRITICAL_INFORMATION'];
-			break;
-
 		case GENERAL_ERROR:
 			if (!$msg_text)  $msg_text = $lang['AN_ERROR_OCCURED'];
 			if (!$msg_title) $msg_title = $lang['GENERAL_ERROR'];
diff --git a/upload/includes/functions_post.php b/upload/includes/functions_post.php
index d04a39f6e..e6b08ca20 100644
--- a/upload/includes/functions_post.php
+++ b/upload/includes/functions_post.php
@@ -7,14 +7,14 @@ if (!defined('BB_ROOT')) die(basename(__FILE__));
 //
 function prepare_post(&$mode, &$post_data, &$error_msg, &$username, &$subject, &$message, &$poll_title, &$poll_options, &$poll_length)
 {
-	global $bb_cfg, $userdata, $lang;
+	global $bb_cfg, $user, $userdata, $lang;
 
 	// Check username
 	if (!empty($username))
 	{
 		$username = clean_username($username);
 
-		if (!$userdata['session_logged_in'] || ($userdata['session_logged_in'] && $username != $userdata['username']))
+		if (!$userdata['session_logged_in'] || ($userdata['session_logged_in'] && $username != $user->name))
 		{
 			require(INC_DIR .'functions_validate.php');
 
@@ -462,7 +462,7 @@ function delete_post($mode, $post_data, &$message, &$meta, $forum_id, $topic_id,
 //
 function user_notification($mode, &$post_data, &$topic_title, &$forum_id, &$topic_id, &$post_id, &$notify_user)
 {
-	global $bb_cfg, $lang, $userdata;
+	global $bb_cfg, $lang, $user, $userdata;
 
 	if (!$bb_cfg['topic_notify_enabled'])
 	{
@@ -565,7 +565,7 @@ function user_notification($mode, &$post_data, &$topic_title, &$forum_id, &$topi
 						$emailer->assign_vars(array(
 							'TOPIC_TITLE' => $topic_title,
 							'SITENAME' => $bb_cfg['sitename'],
-							'USERNAME'    => $userdata['username'],
+							'USERNAME'    => $user->name,
 							'EMAIL_SIG' => (!empty($bb_cfg['board_email_sig'])) ? str_replace('<br />', "\n", "-- \n" . $bb_cfg['board_email_sig']) : '',
 							'U_TOPIC' => $server_protocol . $server_name . $server_port . $script_name . '?' . POST_POST_URL . "=$post_id#$post_id",
 							'U_STOP_WATCHING_TOPIC' => $server_protocol . $server_name . $server_port . $script_name . '?' . POST_TOPIC_URL . "=$topic_id&unwatch=topic")
diff --git a/upload/includes/functions_report.php b/upload/includes/functions_report.php
index bad0a6261..1970611cc 100644
--- a/upload/includes/functions_report.php
+++ b/upload/includes/functions_report.php
@@ -295,7 +295,7 @@ function reports_module_action($reports, $action_name, $action_params = array())
 //
 function report_notify($mode)
 {
-	global $userdata, $bb_cfg;
+	global $user, $userdata, $bb_cfg;
 
 	$num_args = func_num_args();
 	$notify_users = $reports = array();
@@ -550,7 +550,7 @@ function report_notify($mode)
 					}
 
 					$vars = array_merge($vars, array(
-						'REPORT_AUTHOR' => $userdata['username'],
+						'REPORT_AUTHOR' => $user->name,
 						'REPORT_TIME' => bb_date($report['report_time']),
 						'REPORT_REASON' => $report_reason)
 					);
@@ -1067,6 +1067,9 @@ function report_insert($module_id, $report_subject, $report_reason, $report_titl
 		}
 	}
 
+	CACHE('bb_cache')->rm('report_count_obtain');
+	CACHE('bb_cache')->rm('report_count_obtain_exp');
+
 	return $report_id;
 }
 
@@ -1152,6 +1155,9 @@ function reports_update_status($report_ids, $report_status, $comment = '', $auth
 	{
 		report_notify('change', $report_status, $report_ids);
 	}
+
+	CACHE('bb_cache')->rm('report_count_obtain');
+	CACHE('bb_cache')->rm('report_count_obtain_exp');
 }
 
 //
@@ -1235,6 +1241,9 @@ function reports_delete($report_ids, $auth_check = true, $module_action = true)
 	{
 		reports_module_action($reports, 'delete');
 	}
+
+	CACHE('bb_cache')->rm('report_count_obtain');
+	CACHE('bb_cache')->rm('report_count_obtain_exp');
 }
 
 //
diff --git a/upload/includes/functions_validate.php b/upload/includes/functions_validate.php
index 9696cbf73..3f6fa9ecb 100644
--- a/upload/includes/functions_validate.php
+++ b/upload/includes/functions_validate.php
@@ -5,7 +5,7 @@ if (!defined('BB_ROOT')) die(basename(__FILE__));
 // !!! $username должен быть предварительно обработан clean_username() !!!
 function validate_username ($username, $check_ban_and_taken = true)
 {
-	global $userdata, $lang;
+	global $user, $lang;
 
 	static $name_chars = 'a-z0-9а-яё_@$%^&;(){}\#\-\'.:+ ';
 
@@ -45,7 +45,7 @@ function validate_username ($username, $check_ban_and_taken = true)
 
 		if ($row = DB()->fetch_row("SELECT username FROM ". BB_USERS ." WHERE username = '$username_sql' LIMIT 1"))
 		{
-			if ((!IS_GUEST && $row['username'] != $userdata['username']) || IS_GUEST)
+			if ((!IS_GUEST && $row['username'] != $user->name) || IS_GUEST)
 			{
 				return $lang['USERNAME_TAKEN'];
 			}
diff --git a/upload/includes/init_bb.php b/upload/includes/init_bb.php
index 1a92c6994..f83e32a3f 100644
--- a/upload/includes/init_bb.php
+++ b/upload/includes/init_bb.php
@@ -185,7 +185,6 @@ define('SEARCH_TYPE_TRACKER',  1);
 // Error codes
 define('GENERAL_MESSAGE',      200);
 define('GENERAL_ERROR',        202);
-define('CRITICAL_MESSAGE',     203);
 define('CRITICAL_ERROR',       204);
 
 define('E_AJAX_GENERAL_ERROR', 1000);
@@ -415,12 +414,12 @@ define('PROFILE_URL',  'profile.php?mode=viewprofile&amp;u=');
 define('BONUS_URL',    'profile.php?mode=bonus');
 define('TOPIC_URL',    'viewtopic.php?t=');
 
-define('USER_AGENT', @strtolower($_SERVER['HTTP_USER_AGENT']));
+define('USER_AGENT', strtolower($_SERVER['HTTP_USER_AGENT']));
 define('UA_OPERA',   strpos(USER_AGENT, 'pera'));
 define('UA_IE',      strpos(USER_AGENT, 'msie'));
 
 define('HTML_SELECT_MAX_LENGTH', 60);
-define('HTML_WBR_LENGTH', 12);
+define('HTML_WBR_LENGTH',        12);
 
 define('HTML_CHECKED',  ' checked="checked" ');
 define('HTML_DISABLED', ' disabled="disabled" ');
diff --git a/upload/includes/page_header.php b/upload/includes/page_header.php
index f0e77922e..c1a62d1c0 100644
--- a/upload/includes/page_header.php
+++ b/upload/includes/page_header.php
@@ -176,7 +176,7 @@ $template->assign_vars(array(
 	'USER_RUS'          		=> ($userdata['user_lang'] != 'english') ? true : false,
 
 	'INCLUDE_BBCODE_JS'  		=> !empty($page_cfg['include_bbcode_js']),
-	'USER_OPTIONS_JS'    		=> ($logged_in) ? bb_json_encode($user->opt_js) : '{}',
+	'USER_OPTIONS_JS'    		=> (IS_GUEST) ? '{}' : bb_json_encode($user->opt_js),
 
 	'USE_TABLESORTER'    		=> !empty($page_cfg['use_tablesorter']),
 
diff --git a/upload/includes/sessions.php b/upload/includes/sessions.php
index 39e552935..cbb0dd070 100644
--- a/upload/includes/sessions.php
+++ b/upload/includes/sessions.php
@@ -33,6 +33,16 @@ class user_common
 		'h_tsp'    => 0,     // show released title {...}
 	);
 
+	/**
+	 *  Defaults options for guests
+	 */
+	var $opt_js_guest = array(
+		'h_av'     => 1,
+		'h_rnk_i'  => 1,
+		'h_smile'  => 1,
+		'h_sig'    => 1,
+	);
+
 	/**
 	*  Sessiondata
 	*/
@@ -556,6 +566,22 @@ class user_common
 		return $autologin_id;
 	}
 
+	/**
+	 *  Set shortcuts
+	 */
+	function set_shortcuts ()
+	{
+		$this->id            =& $this->data['user_id'];
+		$this->active        =& $this->data['user_active'];
+		$this->name          =& $this->data['username'];
+		$this->lastvisit     =& $this->data['user_lastvisit'];
+		$this->regdate       =& $this->data['user_regdate'];
+		$this->level         =& $this->data['user_level'];
+		$this->opt           =& $this->data['user_opt'];
+
+		$this->ip            =  CLIENT_IP;
+	}
+
 	/**
 	*  Initialise user settings
 	*/
@@ -642,7 +668,11 @@ class user_common
 	*/
 	function load_opt_js ()
 	{
-		if (!IS_GUEST && !empty($_COOKIE['opt_js']))
+		if (IS_GUEST)
+		{
+			$this->opt_js = array_merge($this->opt_js, $this->opt_js_guest);
+		}
+		else if (!empty($_COOKIE['opt_js']))
 		{
 			$opt_js = bb_json_decode($_COOKIE['opt_js']);
 
@@ -653,15 +683,6 @@ class user_common
 		}
 	}
 
-	/**
-	*  Set shortcuts
-	*/
-	function set_shortcuts ()
-	{
-		$this->id  =& $this->data['user_id'];
-		$this->opt =& $this->data['user_opt'];
-	}
-
 	/**
 	*  Get not auth forums
 	*/
diff --git a/upload/language/lang_english/lang_main.php b/upload/language/lang_english/lang_main.php
index 30e0e30f5..c06d95c59 100644
--- a/upload/language/lang_english/lang_main.php
+++ b/upload/language/lang_english/lang_main.php
@@ -59,8 +59,8 @@ $lang['DISABLED'] = 'Disabled';
 $lang['ERROR'] = 'Error';
 $lang['SELECT_ACTION'] = 'Select action';
 
-$lang['NEXT'] = 'Next';
-$lang['PREVIOUS'] = 'Previous';
+$lang['NEXT_PAGE'] = 'Next';
+$lang['PREVIOUS_PAGE'] = 'Previous';
 $lang['GOTO_PAGE'] = 'Goto page';
 $lang['GOTO_SHORT'] = 'Page';
 $lang['JOINED'] = 'Joined';
diff --git a/upload/stats/tracker.php b/upload/stats/tracker.php
index 5798b3d17..56014a7fa 100644
--- a/upload/stats/tracker.php
+++ b/upload/stats/tracker.php
@@ -73,8 +73,6 @@ foreach ($rowset as $cnt => $row)
 	$peers_in_last_sec[] = sprintf('%3s', $row['peers']) . (($cnt && !(++$cnt%15)) ? "  \n" : '');
 }
 
-
-
 function commify_callback ($matches)
 {
 	return commify($matches[0]);
@@ -85,7 +83,6 @@ function commify_ob ($contents)
 }
 ob_start('commify_ob');
 
-
 echo '<html><body><head></head>';
 echo '
 <br /><br /><br />
@@ -125,9 +122,14 @@ echo '</table>';
 
 echo '<div align="center"><pre>';
 
-if ($loadavg = get_loadavg())
+if ($l = sys('la'))
 {
-	echo "\n\n<b>loadavg: </b>$loadavg\n\n";
+	$l = explode(' ', $l);
+	for ($i=0; $i < 3; $i++)
+	{
+		$l[$i] = round($l[$i], 1);
+	}
+	echo "\n\n<b>loadavg: </b>$l[0] $l[1] $l[2]\n\n";
 }
 
 echo 'gen time: <b>'. sprintf('%.3f', (array_sum(explode(' ', microtime())) - TIMESTART)) ."</b> sec\n";