Aperture 3.4.5. When importing, Aperture does see any items in the OS Pictures folder.
Upgraded to Aperture 3.4.5. When importing photos into Aperture, Aperture does see any items in the OS Pictures folder. Aperture sees files in all other folders.
I reinstalled Aperture 3.0 from disk and the problem was not present. After an upgrade back to 3.4.5, the problem persits.
Aperture 3, OS X Mountain Lion (10.8.4)