I encounter the same problem. Photometric calibration started and the progress bar moved but then stopped at about 2/3 and stayed there. I thought the program hanged but it accepted other operations. But the progress bar just still stuck there.
I just am not sure if the calibration fails or what. If it fails, then why it stuck there without saying that it fails (like in 1.0.6). I accpet that you say you are now doing a better job now but a clearer indication is needed.