it might be dep0endant on Vista. I am running Windows 7 and I msut say it is way better than Vista on the performance  and I am able to do things with Carrara that on Vista used to end with frozen application. Yet I don;t know what you are doing, maybe you touched the aspects of C7 that still need to be fixed and I maybe never did anything that would need the failing feature that should work. But5 I am satisfied with C7.1 so far.