What might be the problem here… I am working on a model and I want to select a part and hide it. I drag over it, so that the mask is visible, then I tab 2 times on the selection and… crash. Any ideas? I work with 312B OSX.
Hi there … hmmm … it sounds to me, like you are only masking while pressing CTRL. To hide you are supposed to hold Ctrl+shift.
What happens (at least that’s what i think) is that you are masking your object and when tapping twice you are actually blurring the mask (same as hitting the blur mask button in the masking tab). Well Mask blurring on heavy meshes sometimes does crash, at least since 3.1 PC. In 3.5 R3 i haven’t experienced that problem. So i hope that you OSX guys will soon get your 3.5 version 
Hope that helps.
Yes, you are right, after months of photoshop I try to pick-up ZBrush again, but I’m a bit rusty. Thanks!
Welcome and make sure you’re gonona rock the Z
And … goedenacht from a german living in spain
Dirk
Adios and tot ziens! 