In the Functions allTranslations() of the eZContentObjectState and eZContentObjectStateGroup is a Bug:

$allTranslations[] = new eZContentObjectStateGroupLanguage( $row );

Should be:

$allTranslations[$languageID] = new eZContentObjectStateGroupLanguage( $row );

Steps to reproduce

A eZ Publish 4.0.3 System with 'eng-GB', 'cro_hr', 'dut_nl', 'eng-AU' Locale.
Update to eZ Publish 4.1.0:
Error in addlockstategroup.php:
-No setAttribute() Function

Reason:
The $allTranslations will filling with 3 Languages and the 'eng-GB' Language added because the Index 2 (the LanguageId) is already available.