Extrusion layer with CS5.3.1

Here a configuration which doesn't work with CS 5.3.1. There are two images attached to this mail:
- On the first image, the red face has no extrusion layer (All is Ok)
- On the second image, the red face has an extrusion layer (CS adds a strange step )

Thanks for your work,

Yohann


No source file or test is named. Start by reviewing the attached configuration and images, then reproduce the extrusion-layer case with CS 5.3.1 and trace where the unexpected step is introduced; done means the same configuration no longer produces the strange step.

Rédigé par le modèle d'indexation à partir du texte de l'issue.