When SolidWorks exports to PDF and converts your "Shaded with Edges" views to simply "Shaded," (SW2010 SP4), the solution is to hide the views and then unhide them. After that, saving shows the views correctly.
When SolidWorks exports to PDF and converts your "Shaded with Edges" views to simply "Shaded," (SW2010 SP4), the solution is to hide the views and then unhide them. After that, saving shows the views correctly.
FOLLOWUP:
That doesn't always work. I'll get back to you when I've found an alternate method.