Me too, with the rocks! Vue 4 HATES ROCKS, I tell ya!
I'm on a state of the art Mac, great vid card, enough ram to send home to momma, and dual GIG of speed. I just did a clean wipe of the entire disk and a clean install of everything.
Rocks are e-on glitch. So were having multiple material windows open, but they finally fixed that. I also have probs with LARGE LAND MASSES...Vue 4 does not like you to move them, period.
But, it is a magnificent piece of software - when you can get it to work.

Holly