Software
Aperture: Red Eye may look fixed even when it is not
An image may appear to be fixed by the red eye tool even though there's still some red visible under the loupe or in a print.
Aperture: Will not import images from a device connected to a keyboard USB port
If you connect a camera or card reader to a USB port on your keyboard, Aperture will not import the images, even though the Import dialog will appear.
Aperture: "Insufficient Disk Space" alert when importing images
Sometimes when you try to import images into Aperture, an alert indicating that more disk space is needed occurs, even though there is more than the indicated amount of space available.
 

Aperture: Aliases do not appear in the Import window
When you open the Aperture import window, folder aliases do not appear.
Aperture: May be unable to restore from a vault due to disk issues
When you restore from a vault, you may see an alert message such as “restore library operation failed.”
Aperture: Date on exported master image may be different in rare circumstances
In certain rare cases, the date for exported masters may be different than the original.
Aperture: Some referenced images may be reimported even when Do Not Import Duplicates is selected
When you choose to import new images from a folder that contains some images already referenced by your Aperture library, duplicates of the pre-existing images are sometimes imported. This happens even when you choose the Do Not Import Duplicates option.
Aperture: Cannot import images from a folder with name beginning with a tilde (~)
If you have a folder with a name that begins with a tilde character (~), and the folder contains valid images, Aperture will tell you that there are zero images to import. Drag and drop from this folder also will … Continue reading
Aperture: Library may be unable to be shared
If two or more users simultaneously access the same Aperture Library, you will get an alert message the next time you open Aperture stating there was an issue opening the Aperture Library.
Motion 5: Imported Photoshop files in CMYK color may not behave as expected
Photoshop (.psd) fIles you import in CMYK color may not behave as expected.