Hello,
I have exactly the same problem. Does anybody found out the solution yet?
In debug mode during installation it reports that it failed to write to database with this command.
CREATE TABLE IF NOT EXISTS `ps_paypal_capture` (`id_paypal_capture` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT, `id_capture` VARCHAR(255) NOT NULL, `id_paypal_order` INT(10) SIGNED NOT NULL, `capture_amount` DECIMAL(10,2) NOT NULL, `result` VARCHAR(255) NOT NULL, `date_add` DATETIME NOT NULL, `date_upd` DATETIME NOT NULL, PRIMARY KEY (`id_paypal_capture`)) ENGINE=InnoDB CHARSET=utf8 COLLATE=DEFAULT;