Im having real problems calibrating. When my brightness is full blast and im using adobe gama and full contrast i still cant see some of the dark ones. Anyway good idea with the poll and all.
I had the same problem. But after tweaking some settings in the Nvidia Display Settings, I managed to get some good results and now can see all of the letters (A- just slightly).
And it really makes a difference in images like these. Before calibrating I could hardly se the lower right part of the image.