On Wilmap's website under tutorials is one on common problems. Here is how she says to fix the issue in Daz:

Spikes and Deformations appear

1. Select item and then open the Parameters tab. Here you will see a list of settings. Find the one that says Mesh Resolution, click on the drop down arrow next to the box that says Catmark and select Catmull-Clarke (Legacy). The item should now look normal.

Problem is this dropdown selection doesn't appear in Poser 11.