I am having the same exact issue. Every scene that I render is being saved at a wrong gamma, not what is scene during the render or in the IPR. I did not have this issue before the update, all my scenes rendered beautiful.

To confirm - we don't use the Optix denoiser in any way - our Spectral AI denoiser is completely custom built by us for Octane (for much higher quality), and depends on NVIDIA CuDNN (which NVIDIA initially broke with Ampere, but didn't fix until month later which is why we are only now able to ...