I want to slightly randomize the vertices of an icosphere but such that they still lie on the surface of an ideal sphere so that when I use dupliverts the duplicated objects are just slightly irregularly arranged over the surface of the sphere. Any suggestions?

You can make an icosphere with minimal subdivision, then use the meshtools:

-**Fractal** to reach the number of subdivisions you want

-**To Sphere** to bring the result to a round shape.

But there are other solutions, like using particles.

You could make a spehere, then select the vertice at the top and the one at the bottom, then turn on the proportional edit tool, then change the falloff to â€˜randomâ€™ and rotate the vertices around the z axle a little