Well, I figured out the pattern. Once I load Opera from scratch, and
display the bookcase, and scroll through the JPG images, each image as
it displays will first clear the frame with a grey background, then
update with the current image with a white background. Once that image
has displayed, it is cached and further displays of that image are
much faster. Once all the images are cached, the flickering completely
I only see this happen in Opera, and as "A Lurker" observed, it
doesn't happen to everyone using Opera.
Looking at the "flicker", it is the same background color as the rest
of the page. (bgcolor=#CCCCCC). Perhaps if the frame's background
color containing the images was #FFFFFF it wouldn't flicker.
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