Using SolidWorks 2009 SP4.0 . . .

I am having difficulties with Section View while working on a part in SolidWorks 2009.  I only recently upgraded to 2009, and am discovering all kinds of functionality that works completely differently than it did in the versions since 2004, when I started using SolidWorks.  So I am not sure whether what I am experiencing is a bug or just another new feature I should be really excited about.

I created a pretty simple part with two features.  The first feature is a Revolved Base (basically a hollow tube), and then a Swept Cut (threads cut into the tube along a Helix/Spiral).  The problem is I cannot seem to get the Section View to work with the completed part.  When I select Section View on the Front Plane, I do indeed see the previewed section, but when I click on either of the green check marks, the model reverts to the normal view, though the Section View button remains "pressed" to indicate I am still in Section View Mode.  Clicking the button one more time takes me out of Section View mode, but otherwise does nothing.

Now, here's the really bizarre behavior.  If I roll the model back to the Revolved Base, the Section View works fine.  At this point I thought maybe there was something wrong with my Swept Cut, so I deleted it and built a new one.  Same result, I cannot get a section view.  Then I deiced to delete both features and re-do them.  Again, Section View works fine when rolled back to the Revolved Base, but once the Swept Cut is part of the model it doesn't work.

The only time I can get it to work on the completed model is, believe it or not, if I angle the section plane along the Y axis away from the Front Plane.  Then it works every time.

So what am I dealing with here, annoying bug or glorious new feature?