Digital BW, The Print

I have experienced the same thing - at first I thought it was my Epson 2000P printer .... Try Jonathan Sach's Picture Windows Pro. It supports BW in 16 bit and Color in 48 bit for all functions. The gradients DO work quite nicely.

http://www.dl-c.com

Best,
Alex

... but whenever I have open, 
> evenly illuminated areas, i.e. blank sky, calm water, I get a slight 
> to horrendous posterization. It's very subtle on the monitor but 
> evident on the output.