Do you realize this is the AutoCAD 2012 forum?
I have no problems hatching in AutoCAD 2011.
How about some details of YOUR problem and some computer specs?
you can try HPQUICKPREVIEW=off.
Why is it that I can't get my Solid hatch to print mostly transparent it just prints in solid black??
I don't know if this is something new in 2012, but if you change your hatch to a color that plots with a 10%-15% screening (or something else you prefer), it should plot "transparently" depending on your lines merge setting.