Thank you for your response, yes the name is not totally related to the message, but this behavior reminds me of LSB. However, I found it while using Propel 1.6 on PHP 5.4 with nested_set behavior and I can tell now that Propel 1.6 + nested_set cannot work on PHP 5.4+ (I checked on PHP 5.5 and the behavior is the same as PHP 5.4). I hope someone more competent than me will check this and be able to actually tag it as a bug or a feature. Keven -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php