When I restart Aperture it is continuously busy 'processing' unless I rebuild the library each time; that's time consuming and annoying. I think I probably have one (or more) somewhat corrupted images and I liek to isolate it/them. I though one way to try would be to save e.g. projects somewhere else and then delete from Aperture; repeat until it's OK. Maybe there are better solutions? If not, how do I save parts of the library and bring them back later after finding they are OK?