Hey.
Octane 4 - RC2
Something is wrong with Specular Materials in the Denoised Beauty pass. It's completely blown out. The undenoised pass looks fine.
Here's a comparison of the two versions (Denoised Beauty - left, Normal - right)
Here's the scene for Blender
http://www.andreasresch.at/upload/Octane_Test_33.zip
Cheerio,
Andreas