Issues with Thumbnails & Previews in Aperture
I'm using Aperture on MBPr 13" (mid 2014) on OS X Yosemite (10.10.3). For some reason some of my thumbnails are distorted. They look like brightly coloured glitchy snow.
I've rebuilt all the thumbnails 3 times, and every time some of them end up like this. My library is about 250GB, 52k photos.
I also removed all the previews, but I see that there is still a preview folder in the library, why does the preview folder remain even after removing all previews? The preview folder is about 2.5 GB.
MacBook Pro with Retina display, OS X Yosemite (10.10.3)