I am seeing reports of a problem with smart albums under Aperture 1.5.1. It only affects smart albums that use ratings AND are have not been created inside a project (created at the library level). Creating a smart album inside a project makes it specific to that project, so this is not a workaround. Existing smart albums and those created under 1.5.1 seem to be broken.

Also, cropped images on contact sheets are said to be distorted.

I am not running 1.5.1 yet, so don't have any independent assessment of these.

Tags: Aperture, Smart Albums, Contact Sheets