backup_migrate_destinations' doesn't exist query (prefix missing ?)

I upgrade to the last Backup and Migrate 6.x-2.x-dev (2009-juill.-08)
Of course, I run the upgrade.php.

As soon I go in Backup and Migrate configuration, I have this error message :

    * user warning: Table 'dm_epa.backup_migrate_destinations' doesn't exist query: SELECT * FROM backup_migrate_destinations in /home/didier/www/drupal/sites/all/modules/backup_migrate/includes/crud.inc on line 591.
    * user warning: Table 'dm_epa.backup_migrate_profiles' doesn't exist query: SELECT * FROM backup_migrate_profiles in /home/didier/www/drupal/sites/all/modules/backup_migrate/includes/crud.inc on line 591.

I check with phpMyAdmin : prefix is missing !

the table is not "dm_epa.backup_migrate_destinations"
but must be "dm_epa.drup_epabackup_migrate_destinations"

the table prefix "drup_epa" is missing !

In the Drupal setting.php, I have the line
$db_prefix = 'drup_epa';

It seem that part of the Backup and Migrate code doesn't use this db_prefix ...

I try to desactivated the backup and migrate module, and uninstall completly.
I check with phpMySQL and the tables "dm_epa.drup_epabackup_migrate_..." were deleted (correct)

I reactivate the module, and try again, but the problem reoccurs.

It seem to be a bug, probably not important but I can use the module.
Thanks for your help and for this module