Aperture 3: Darker photos after converting library from Aperture 2 to Aperture 3

When a library created in Aperture 2 is opened in Aperture 3 for the first time, some photos may be much darker than expected.
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This may happen to photos that have had the Enhance adjustment brick applied with changes to the Saturation slider but not the Contrast slider. In some cases, Aperture 3 sets the Contrast slider from 0 to 1 during library conversion, resulting in images that look darker than expected.

To fix this issue, move the Contrast slider in the Enhance adjustment brick back to 0 for any affected photos.

This document will be updated as more information becomes available.

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