Index: branches/RC/core/kernel/db/dbitem.php
===================================================================
diff -u -N -r10005 -r10098
--- branches/RC/core/kernel/db/dbitem.php	(.../dbitem.php)	(revision 10005)
+++ branches/RC/core/kernel/db/dbitem.php	(.../dbitem.php)	(revision 10098)
@@ -653,10 +653,10 @@
 			return $res;
 		}
 		if ( isset($params['max_len'])) {
-			$res = $res && strlen($val) <= $params['max_len'];
+			$res = $res && mb_strlen($val) <= $params['max_len'];
 		}
 		if ( isset($params['min_len'])) {
-			$res = $res && strlen($val) >= $params['min_len'];
+			$res = $res && mb_strlen($val) >= $params['min_len'];
 		}
 		if (!$res) {
 			$error_params = Array (getArrayValue($params, 'min_len'), getArrayValue($params, 'max_len'));