blank preview with hearty heron

[SwampYankee <SwampYankee optonline net>]

Hi,
F-spot shows a row of thumbnails but the larg picture in the center of 
the screen is just a blank frame.  Actually, it is a picture of a frame 
with the lower left corner kind of turned over.  Should the selected 
image show here?  The slider to change the size works but I can't get 
anything but the gray frame to display.  I uninstall and reinstalled but 
no chage.   Any idea what I am doing wrong?
thanks