Continuing with AMD's attempts, especially since the start of the Crimson Edition line, to release a driver alongside big game releases, the graphics vendor has published Radeon Software Crimson Edition 16.9.2. This one aligns with the Ultimate Edition SKU of Forza Horizon 3 from Microsoft Studios, which unlocks in a little over a day. Standard and Deluxe Edition users will need to wait until Tuesday, the 27th. As always, it rolls in all of the tweaks and fixes that AMD has found prior to the game's general release.
Also, AMD has fixed several issues, according to their pleasantly verbose release notes. Crimson Edition 16.9.2 should resolve crashes that occur in Multi-GPU mode with Ashes of the Singularity in DirectX 12. It should also fix things like mouse pointer corruption on RX 400 series graphics.
You can pick it up from AMD's website, for Windows 7, 8.1, and 10, both 32- and 64-bit versions.