You've also got a problem with her lashes on the bottom shot.
I'd need to see you settings and the scene, but at a guess, perhaps the hair cap is sharing the same vertices as her forehead? This will impact Octane's ability to render transparencies. The give-aways that this might be the issue is her eyelens material has blackened out her eyes.
The easy fix is to drop the rayepsilon in the render settings, however the Poser default is 0.00001, which is about as low as you can go. Regardless, double check your rayepsilon and see if increasing/decreasing it helps/hinders.
Also, specular materials, the light transmitting through the "glass" can be given a different priority to the direct light - this is a setting in the PMC kernel.
So in summary, I think this is resolved through the kernel settings, but I'd need to see you exact settings and materials to provide any more info.
[EDIT] If could also be your emitter settings. Is it a single poly emitter? Which prop did you use for the emitter? How you looked at Wim's post in these forums regarding setting up emitters?