After 3.4.2 and 3.4.3 updates the same lengthy 'processing previews' starts and finishes a day later but keeps starting 'processing previews' again and again.
I have deleted Aperture and reinstalled from app store, spent many hours looking through forums and many people with the same problem amongst other things. After processing has finished I restarted Aperture and the processing started all over again, I have done absolutely everything advised on the forums, deleted this and that and utility disk scan, deleted .plist files and many more etc. etc. to no avail.
If anyone has any fix for this highly irritating and very time consuing issue then please post your solution here, I would be very grateful for any advice whatsoever.