Hi, I’ve just started the trial version and by now i can tell the software is great but I’m getting graphical glitches exactly like the ones in this old thread
http://www.zbrushcentral.com/zbc/showthread.php?t=50611&highlight=glitching
I noticed that one person fixed this by upgrading their drivers, i’ve used a few revisions of mine with no luck 
My spec is a Q6600 with 4GB of ram and an 8800 GTX, very stable, orthos tested for days.
Anyone else or is it just me?
Peace