Am I lossing it I thought the latest firmware was .400 but https://dl.djicdn.com/downloads/Mavic_Mini/20191204/Mavic_Mini_Release_Notes_en.pdf states it's .300

Have DJI gone back to the earlier firmware.

check the date on the link you posted - those are the release notes for 1.0.3 version - https://dl.djicdn.com/downloads/Mavic_Mini/20191204/Mavic_Mini_Release_Notes_en.pdf

here is for the latest
https://dl.djicdn.com/downloads/Mavic_Mini/20191231/Mavic_Mini_Release_Notes_en.pdf

sbonev Posted at 3-3 05:15
check the date on the link you posted - those are the release notes for 1.0.3 version - https://dl.djicdn.com/downloads/Mavic_Mini/20191204/Mavic_Mini_Release_Notes_en.pdf

here is for the latest

Thanks it seems that DJI's websites navigation is a bit screwed up.

Hi, thank you for reaching out and we're sorry for the inconvenience caused. We already verify this query of yours, the latest firmware available for the DJI Mavic Mini would be .400. It seems that the website released notes is currently not yet updated, I will also make a follow up on this one. Should you have other inquiries or concerns, please don't hesitate to reach us. Thank you for your understanding and support!