Index: trunk/kernel/include/itemdb.php
===================================================================
diff -u -N -r4077 -r7867
--- trunk/kernel/include/itemdb.php	(.../itemdb.php)	(revision 4077)
+++ trunk/kernel/include/itemdb.php	(.../itemdb.php)	(revision 7867)
@@ -371,7 +371,7 @@
   {
   	 global $Errors;
   	 
-     $sql = "INSERT IGNORE INTO ".$this->tablename." (";
+     $sql = "INSERT INTO ".$this->tablename." (";
      $first  = 1;
      foreach ($this->Data as $key => $value)
      {
@@ -654,18 +654,28 @@
     
     function TableExists($table = null)
     {
-    	// checks if table specified in item exists in db	
-    	$db =& GetADODBConnection();
-    	$sql = "SHOW TABLES LIKE '%s'";
-    	if($table == null) $table = $this->tablename;
-    	$rs = $db->Execute( sprintf($sql, $table) );
+    	static $tables_found  = Array ();
     	
-    	if( $rs->RecordCount() == 1 ) // table exists in normal case
-    		return 1;
-    	else // check if table exists in lowercase
-    		$rs = $db->Execute( sprintf($sql, strtolower($table) ) );
+    	if ($table == null) $table = $this->tablename;
     	
-    	return ($rs->RecordCount() == 1) ? 1 : 0;
+    	if (!isset($tables_found[$table])) {
+	    	// checks if table specified in item exists in db	
+	    	$db =& GetADODBConnection();
+	    	$sql = "SHOW TABLES LIKE '%s'";
+	    	
+	    	$rs = $db->Execute( sprintf($sql, $table) );
+	    	if ($rs->RecordCount() == 1) {
+	    		// table exists in normal case
+	    		$tables_found[$table] = 1;
+	    	}
+	    	else {
+	    		// check if table exists in lowercase
+	    		$rs = $db->Execute( sprintf($sql, strtolower($table) ) );
+	    		$tables_found[$table] = $rs->RecordCount() == 1 ? 1 : 0;
+	    	}
+    	}
+    	
+    	return $tables_found[$table];
     }
     
     function raiseEvent($name, $id = null)