[Paraview] Filter pulldown menu grayed out

[rasm1 at rasmsys.com]

Hello,

I am testing a build of Paraview 3.6.2  on Mac OS X 10.6 Cocoa.  I am  
using Qt 4.5.3, and built for the x86_64 architecture.  After much  
trial and error, I got a .app package built, with my own filters  
installed in the Plugins folder of the .app.  That was pretty exciting.

The app runs, but after the first filter is chosen from the Filters  
menu, the Filters menu becomes grayed-out and filters are no longer  
accessible.  The first filter always loads and does what it is  
supposed to do.  This applies to any Filter, my own or one from the  
standard distribution.

Further, if I delete the items in the pipeline, and load a new source  
or from a new reader, the Filters menu continues to be grayed out.  It  
basically lets me choose one filter per session.

Is this me being bone-headed, or has anyone else encountered something  
like this?  If I must, I will revert to a build for Carbon and i386.   
Hopefully I've learned enough from the past five weeks of  
trial-and-error the downgrade wouldn't be too difficult.

Any thoughts?

Thanks,
Erik