I totally agree with the idea that this is a BUG or a POORLY DESIGNED interface with Flickr. I have hundreds of images on Flickr. I use Flickr to keep photos online, and then pull them from Flickr to my account at Imagekind to offer them for sale. I have also enjoyed posting to groups and even getting into competitive groups with awards, but since the update to 3.1, Aperture has deleted some of my most commented photos from Flickr. Also, here's a nasty bug, If I have a photo in more than one set, when Aperture auto-syncs photos, it adds a copy of the picture for every "set" it is in, since all the sets (treated as "albums" in Aperture) have downloaded a preview of the picture back to my computer. I have one photo that repeatedly shows up as a new upload every time I open Aperture. Does anyone know of a 64 bit compliant Flickr uploader? If one exists, I'm going back to that to upload photos. Some of the images Aperture deleted from Flickr were heavily viewed and commented photos. It took weeks to get them the visibility they earned, and now all records of that is lost thanks to Aperture 3.1. I have never liked the way Apple chooses to manage online images from within their apps, both iPhoto and Aperture. Auto-syncing should be an OPTION, not mandatory. I should be able to tell the computer exactly what I want uploaded, and be able to put all of the information in at the level of Aperture, and not have to go to Flickr to modify anything. This seems logical, but it appears to be a "last minute add-on" that was not well thought out. Aperture is supposed to be a "PRO APP" but when I am not given control over features like this, it feels more like another "social networking" app that treats my content the way it wants to. I too have several libraries, and have photos uploaded from each of them. Frustrating to know that I can't keep my hard drive on my laptop cleared of older photos without risking them being deleted from Flickr. ugh. HELP APPLE!!!!