Index: branches/5.2.x/core/kernel/db/db_connection.php
===================================================================
diff -u -N -r14609 -r14811
--- branches/5.2.x/core/kernel/db/db_connection.php	(.../db_connection.php)	(revision 14609)
+++ branches/5.2.x/core/kernel/db/db_connection.php	(.../db_connection.php)	(revision 14811)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: db_connection.php 14609 2011-10-03 13:05:08Z alex $
+* @version	$Id: db_connection.php 14811 2011-11-30 14:34:58Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -920,22 +920,32 @@
 		 * Allows to detect table's presence in database
 		 *
 		 * @param string $table_name
+		 * @param bool $force
 		 * @return bool
 		 * @access public
 		 */
-		public function TableFound($table_name)
+		public function TableFound($table_name, $force = false)
 		{
-			static $table_found = Array();
+			static $table_found = false;
 
-			if (!preg_match('/^'.preg_quote(TABLE_PREFIX, '/').'(.*)/', $table_name)) {
-				$table_name = TABLE_PREFIX.$table_name;
+			if ( $table_found === false ) {
+				$table_found = array_flip($this->GetCol('SHOW TABLES'));
 			}
 
-			if (!isset($table_found[$table_name])) {
-				$table_found[$table_name] = $this->Query('SHOW TABLES LIKE "'.$table_name.'"');
+			if ( !preg_match('/^' . preg_quote(TABLE_PREFIX, '/') . '(.*)/', $table_name) ) {
+				$table_name = TABLE_PREFIX . $table_name;
 			}
 
-			return $table_found[$table_name];
+			if ( $force ) {
+				if ( $this->Query('SHOW TABLES LIKE ' . $this->qstr($table_name)) ) {
+					$table_found[$table_name] = 1;
+				}
+				else {
+					unset($table_found[$table_name]);
+				}
+			}
+
+			return isset($table_found[$table_name]);
 		}
 
 		/**