Downloaded and installed 17.5 today, but discovered a problem when rendering my "scene" (it's not finished and only a clay shader so far), where black areas appeared on the model (similar to what might appear if you have overlapping meshes).
This doesn't appear in the Stable version (v16.3.3), neither did it in the previous Test version (17.4).
I isolated just the main mesh (so there's just 1 object + camera in the active layers, made sure there was no overlapping geometry etc.
As I'm writing this I did some more tests, creating a new mesh etc, and:
It appears to only happen on faces in the Y-axis (rotating it slightly and it goes away), and only with the Universal Shader (If I switch to Diffuse the black areas disappear).
So it might be a Octane problem (rather than OcatneBlender)!? But I don't know where to report that!
(*Using the Test builds to speed up animation rendering..)