Aperture 3 Faces & Screen Saver Issue Update
The day after I thought I had solved my issue with Aperture 3 and it not showing up as a Screen Saver or Desktop option, it happened again! Frustrated I rebuilt the thumbs and generated the previews as done previously, but nup, nadda, still stuffed. Then it dawned on me that I had also turned Faces back on. Turn it off and Aperture appears again as an option. Rather annoying and hopefully something that will be addressed because I love the Faces feature but I like my Screen Saver using my Aperture Library more.