Loving the new zbrush ,so so cool ,but just found this out and able to reproduce it every time(on my system anyway,might not do it on other peoples systems).Go into projection master ,select directional brush with an alpha selected using drag rectangle mode.Then press w to move and …bye bye zbrush.
i’ve got the same issue
Same problem here. Using a p4 2.8 xp pro latest SP, 3 gb of RAM