since the most recent upgrade all my photos import and then turn black. Happened with two different scan disks. Anyone else have this problem?
For existing photos, select all your images in Grid view, and then click the Reset All button in the Quick Develop panel. Then click the Auto Tone button to properly apply this feature.
To prevent this from occuring in the future, choose Lightroom > Preferences > Presets (Mac OS) or Edit > Preferences > Presets (Windows). Uncheck Apply auto tone adjustments.
Let us know if it helps.