Index: db_connection.php
===================================================================
--- db_connection.php	(revision 14719)
+++ db_connection.php	(working copy)
@@ -920,22 +920,30 @@
 		 * 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 ($table_found === false) {
+				$table_found = array_flip($this->GetCol('SHOW TABLES'));
+			}
+
 			if (!preg_match('/^'.preg_quote(TABLE_PREFIX, '/').'(.*)/', $table_name)) {
 				$table_name = TABLE_PREFIX.$table_name;
 			}
 
-			if (!isset($table_found[$table_name])) {
-				$table_found[$table_name] = $this->Query('SHOW TABLES LIKE "'.$table_name.'"');
+			if ($force) {
+				if ($this->Query('SHOW TABLES LIKE "'.$table_name.'"')) {
+					$table_found[$table_name] = 1;
+				} else {
+					unset($table_found[$table_name]);
+				}
 			}
-
-			return $table_found[$table_name];
+			return isset($table_found[$table_name]);
 		}
 
 		/**