"Venetian Blinds" problem with my digital camera

I’ve got a Fuji Finepix A301, and recently, it simply stopped taking good pictures. The LCD on the back still shows a fine, full-color representation of what I’m looking at, but once the picture is taken, the LCD shows a “whited out” version of the same picture, as though photographed through white venetian blinds.

When the “white” pictures are uploaded to my computer from the camera, it is more obvious what is wrong with them: it appears that every few horizontal lines in the picture, one line will be completely white. I haven’t zoomed in to see how many lines (every other, every third, whatever) are affected, but it is a regular pattern, and generates a moire effect on my screen when viewed at actual size.

What puzzles me is that the LCD (in “aiming” mode) shows a faithful representation of what the camera “sees”. Do any of you dopers know enough about how a digital camera works to say what could be wrong?

WAG: the memory card could be corrupted. Try reformatting it or using a different card.