This model has very serious overhangs and you need to adjust your settings appropriately. Hey! No snickering! It is also a little larger than standard Makerbot print heights, so you may have to scale it down a bit.
I hope it doesn't violate the Thingiverse prohibition on sexually explicit images!
More on the Venus of Willendorf: http://en.wikipedia.org/wiki/Venus_of_Willendorf