After I took photo by Xoom camera with auto settings turned on, the taken photo had large swathes of green. Then I switched it to night mode and the picture was taken just fine. Shouldn't "Auto" mode take a picture with night mode enabled if theres not enough light? The camera auto detect settings not perfect.
To fix the camera issue, holding the up volume and pressing power at the same time until the Xoom resets. The hard reset won't erase any data nor apps, just clearing the Xoom and starting fresh.