I have zbrush installed on an intel i7 930 with 6gb of ram with windows 7 64 bits. But when i want to export the mesh as an obj i get the following pop up and the program closes 
the mesh is not highly detailed. it just has 6 divisions and on a system like this i guess it will go much further. Please help me!
Hi, My problem look like yours.
A have an Asus P5K SE motherboard, Win 7 64 bits, 8 g ram and a Ati Firepro v4800 1g and many Gigs free on hd.
With a very simple objet I can’t click on preview Adaptive skin without a crash like yours (I must use Classic Skin)
Recently, a have always this crash when I want to open an objet that force me to click on Computer to go to an other partition.
My screen become often nearly white and sometime …crash…
I think (i am sure) that Zb have a problem to manage the memory.
In comparaison, Photoshop CS5 fly (quick, clear, etc).
I will soon follow the suggestion made by the support team and reinstall Win 7 64 …soon…
Sincerely I see no difference in performance in comparaison with my old setting: Win 7 32 bits, 3 g ram and Ati FireGL 256 megs.
