As general troubleshooting: did you remove the battery and wait for while before putting it back and trying to reboot?

Re: Green tinted camerashots: just played around with it, noticed depending on the subject, lightsource or angle, the white balance shifted dramatically, sometimes for the better, often for the worse... so it may not be a real hardware/firmware issue. Would be nice if you could set/lock the white balance, not just for taking care of this issue.