A couple of questions.
1. If you extract the image in EZGS 6 without running in batch, does it show the color shift. This will tell us if it happens as part of the extraction process or part of the saving process. Also, if it only happens in batch, then check the color profile on the saved image. Is it still sRGB after batching?
2. If you extract in EZGS 7, does it show the color shift? I know you are not able to batch EZGS 7. But if you run it as a one off, does it show the shift?