Okay this is an annoying issue i have from time to time,I can sculpt for hours and suddenly when I’m going to import an alpha to my brush i click the import button but nothing happens,I have tried every way i know but it refuses to give me the browse window!
This is a very random issue!
Thanks guys!
We can’t even begin to figure out what might be wrong unless you provide key information like which release of ZBrush you’re using and what your system specs are. 
Ohh im sorry aurick!!
Zbrush 3.5 r3
Cpu = Core i7 920
Graphic = Asus 8800GT
Motherboard = Gigabyte EX58-UD5
Memory = Cosair 1600mhz xms3 (6gig) DDR3
Harddrive = 74gb raptor 10000 rpm
I have only had this problem with R3:(
Hey there,
yeah sometimes ZB just doesn’t want to communicate. Happens also with textures. Usually i go out of edit mode and back in. That normally solves the problem.
Hope that helps.
Thanks for the reply!
No that didnt solve the issue for me 
Guess i have ti reinstall zbrush and see if it works
Ohh i forgott to mention i run
Windows Vista X64 if it matters?