hi Michael. It is not normal to have only 1 white box with the THX pattern. Try it via the BD disc and see if you get the same result.
On early QD780 firmware / THX pattern combos, the whiter than white on the THX did not show up…but this was fixed. Verify with the THX Calibrator Disc.
Also, on the Samsung plasmas (8000 series), I am using a contrast setting of 95…which allows the 10 point WB controls to align nicely with the % of white increments.
