I ve just tried to open one of my scenes (3.5 final): http://www.dropmocks.com/mBghpf Nice crash dump, it seems you made some extended crash log. I happened after loading this scene from some other scene. When starting with clean Unity, it went OK. 16GB ram, Win7. Unity and memory leaks, it is going worse and worse... Edit: This one happened during play mode: http://forum.mymmo.cz/demo/scene2.jpg So this is that claimed "Unity quality"? This wasnt happening on 3.4. This clearly shows, that you are NOT TESTING ON MORE HEAVY SCENES.