OT: 3D PDF Section Views in Acrobat Reader XI

I’m having problems when viewing a 3D PDF saved from a Rhino model using the Simlab plugin. When I enable Cross Section and call up the Cross Section Properties panel, I can make dynamic sections in any plane without a problem and it all looks good. However, a couple of seconds after I release the Offset slider, the view reverts to being un-sectioned. I can’t find anything in the documentation or online that covers this. The ‘save section view’ button is also permanently greyed out.

Is anyone else experiencing the same problem and is there a solution?