I've been having this problem in Aperture lately (both before and after the 3.3 update).
I suspected the size of my Aperture library was to blame (450 GB on external drive) so I made a new smaller library with only newer items (160 GB on local drive) and the problem persists.
To explain the problem a little more clearly…when I'm editing a batch of newly imported photos sometimes instead of the preview of the thumbnail loading I'll have a preview of some (seemingly random) old picture (from another folder) show up. And that image continues to show up when I move onto the next thumbnail, change adjustments, etc. If I do a crop I can usually see the correct image preview from that particular thumbnail but then once I'm done editing or after a few moments the random picture from another folder will show back up.
As you can imagine this is very annoying and killing my workflow. I've already tried library repairs as well as disk permissions repairs to no avail. Anyone else having this issue? Any tips on resolving?
Sounds like a Library that needs a Repair and Rebuild. Check out the FAQ section Joseph has put together. Cheers
davidbmoore@mac.com
Twitter= @davidbmoore
Scottsdale AZ
If Rebuilding your library doesn’t work, then you might want to try forcing Aperture to regenerate all thumbnails. To do this, right click on your Aperture library in Finder and select show package contents. Then move the thumbnails folder outside the library and give aperture sometime to regenerate the thumbnails.