default folder graphic ?

[Mark Swindell]

What might be stopping a graphic from displaying in development mode in the
following situation:

Two different graphics, two different sources.

Path:
Backgrounds/buttonbg.jpg     will not display, while
Backgrounds/cardbg.jpg      will display

The folder "Backgrounds" is located at the same level as the Revolution
1.1.1 application. 

If I use the complete path, graphic buttonbg.jpg does display.  It just
won't display with the shortened path.

The other one, however (and several others), display with the shortened
path, no problem.  

What might the variable be?  The source jpg is named correctly.

Thanks,
Mark