0.33.0 - rev 3.x images for the NANO and the Guition
A NANO bought in August came up as chip revision v3.1, and every release we had was refused by the flashing tool. The board was fine; the image was built for the other silicon family, and the two fence each other off on purpose.
Both boards now build and publish a -rev3 image beside the plain one, each with its own update address, so a device is never offered the other family's build. The browser flasher offers the choice, and docs/FLASHING.md says how to ask a board which chip it has.