Most of the time, however, the problem is usually the effect not actually being displayed upon preview. It seems like it only happens when multiple pics are overlapping, such as in the screenshots below.
EDITABLE PAGE IN VSD
http://img.photobucket.com/albums/v173/cnoyes/Image1.png
PAGE IN VSD's PREVIEW
http://img.photobucket.com/albums/v173/cnoyes/Image2.png
This particular event happens to be a ghost image in the frame and not a loss of effect, so I'll try to play with it until I can recreate the inconsistency, then post that screenshot. The above example is still as irritating, however, and occurs nearly as often as the loss of effect. Thought it was only happening with PNGs, but I'm also seeing it with JPGs and BMPs. Any thoughts?
P.S. Strange things are also happening if I copy and paste text boxes. It will sometimes effect every object on the page, adding fragments of the copied text to random pics and objects--problems will sometimes even carry over to other pages....uber-odd.