Then you must have disabled raytracing. These are raytraced shadows. You have to have raytracing and shadows checked to get them. Look at your last two renders. The previous one had shadows. The last one doesn't and has nostril glow and there is no occlusion shadow in the lips and the right ear is lit when it shouldn't be because the main light is from stage right.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)