I did have archive invalidated on but that didn't help it seems like a random problem.because when I restart the game the problem is gone for a while before it appears again in some random place. I'm starting over from scratch now btw with FOMM only. One thing I wondered since it seems to happen at random? I have a AMD PhenomII sixcore CPu and a 560ti wth 1gb of vram and 7gb system ram. When using NVSE how do make new vegas run with the 4gb patcher,are then even compatible?