Hinduism...Why do devotees not finish a circle around the temple in Shiva temples?

I've seen devotees finish a complete circle of the sanctum in all the temples. But in Shiva temples devotees don't finish the circle. Instead they go half way and return to the other end. Why is it so? pls explain.
Update: @ Always Good. Even on normal days, I've seen it in many temples in Tamil Nadu and Kerala.

@ ssrvj. No i'm from Bangalore, but i've been to many temples in Kerala and Tamil Nadu. Thanks for pointing that fact.
Update 2: @ Daya. The difference is that devotees dont go to temples for 2 rupees, like you who talk all sort of rubbish for 2 points.
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