When doing an image search, all thumbnails are visible. But if an image is clicked on, the place where the image would be enlarged is blank. If the area where the image SHOULD be is right clicked, all normal options are displayed (the unseen image can be opened in a new tab, etc).
Similarly, the built-in browser, in sketchup (which accesses the 3d warehouse), will not show ANY graphics, aside from the page footer. I assume this is related since it behaves in the exact same way. I assume the sketchup browser piggybacks off the default browser?