I can't build anything without crashing every five to ten minutes. I can't pin it down, it seems to be just random, usually upon keyboard or mouse action.
For example, select five or six prims and select a texture, crash. Select two prims and move them, crash. Move a prim, crash. Crash crash crash.
I can work for a while sometimes.
Twice it has just crashed out of the blue when I wasn't even near the computer (perhaps when it tried to go AFK?)
Can anybody build without crashing? What can you actually do in 1.7 besides stand around and chat with up to two other avs?