JBook appears as all-gray on an XO laptop
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aoliver
When you launch JBook on an XO laptop, it comes up as a gray screen. The default size is 0x0, apparently, in the Sugar environment.
A workaround is to hit the rotate button (to the left of the screen) two or four times, depending on whether you will use it in ebook mode or laptop mode. Then JBook paints and can be used normally.
However, ti should resize to fill the screen automatically.