Tried to pull up D1,000,000 on Patent Center and the system has apparently not been updated to accommodate the extra digit: https://files.mastodon.social/media_attachments/files/111/131/311/720/988/094/original/09c796b7729e8b20.jpg
Workaround: Search by application number. https://files.mastodon.social/media_attachments/files/111/131/457/722/563/317/original/486d36c390278f21.jpg
Update: This has now been fixed. #OneMillionDesignPatents