I've followed this tutorial:
I've made a Curve > Path. I've then set frames under Path animation to 600 frames and enabled Follow. I've enabled duplication for the cube to frames and unchecked speed. Then I've parented my cube to the path.
On my path there should now be 600 copies of my cube/object. But there are only about a 100. Why is this happening? How can I fix this?
My blend file: http://www.pasteall.org/blend/26936