This release fixes bugs in 3.2beta4 and introduces a small number of new features, notably the ability to update the firmware on some versions of PanelDue from the Duet. Upgrade notes and the changes list are at https://github.com/Duet3D/RepRapFirmware/blob/v3-dev/WHATS_NEW_RRF3.md.
As usual, users of Duet 3 with attached Single Board Computer can update via the unstable package feed instead of using these files.
Updated 2020-12-03: I have updated the binary files for the Duet 3 expansion boards EXP3HC, TOOL1LC and EXP1XD to version 3.2beta4.1. These new binaries fix a stack overflow in 3.2beta4 when a heater fault occurs on a tool or expansion board.