Thank you!  That's it.  Opening a file in an older version of Poser resets the gamma correction to 1.

I left the gamma correction alone in Poser 2012.  It came set to 2.20, and I seem to recall checking the manual or the SM site and it said that's what it should be. 

I like how it looks at 1.00 better.  Though I guess it is less realistic.