One interesing thing I noticed on my machine was that the bubbles appeared correctly in the 'Application' mode they offer. I normally use Backlight, though.
I have to say that my iBook 800 has a hard time driving a second display with an animated desktop, but since it wasn't an advertised feature, who am I to complain?
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I replaced only the saver bundle, and the problem seems to have been resolved. I don't use the application; I prefer backlight.