I don't know if it is SNAP itself, or other components of AOS, but on my SMP machine running old SNAP/ECS 2.2 beta the machine/desktop would freeze - usually right after the desktop background appeared, but also sometimes later. The freeze did not happen with Panorama. With AOS 5.0 and new SNAP on the same machine I have no problems with the machine freezing. I did have a problem with the machine crashing periodically when the desktop started to appear with new SNAP, which AN tracked to down to how LCD fonts were being loaded, and sent me a patch.