Roundcube and MySql 5 (MySql5) Problem

[Bimbusko]

In install roundcube with MySql 5. When i make first time login
( $rcmail_config['auto_create_user'] = TRUE; )
then aplication is stoped. When i push secondary time LOGIN button
i have problem with identities.

When i redirect database to MySql 4 then rouncube work good.

Any can help me ? Or is it program bug ?

Thank you

Marian