Yes! You need to go into Tools/Configure Konqueror. Go into the Previews & Metadata section and increase the Maximum File Size. It's not displaying the images because they are too big for the current setting.
Vik :v) [Robert Fisher] Ah! This will probably be the answer for me too. Upgrading to KDE 3.2.3 (when I noticed the problem) probably coincided with my purchase of a new camera with 12 million pixels. Thanks, I will try this tonight.
