Please see this post for a description of the problem, which hours of work have convinced me that this is a bug in ImageCalibration:
http://pixinsight.com/forum/index.php?topic=2981.0I have also sent a series of messages to Vicent's hotmail account containing links to a sample raw, master dark, master bias, master flat, calibrated light with Optimization Checked and calibrated light with Optimization unchecked.
Please post responses, if any, in that thread.
Thank you.
-Jeff