If you need to do a clean wipe of Aperture use [url]http://www.appzapper.com/[/url]
I'm sorry I can't help with the issues. I haven't used Aperture in at least a year. I would definitely look for updates in the Apple Aperture Discussions: [url]http://discussions.apple.com/category.jspa?categoryID=184[/url]
I personally use LR as Aperture 2 was no comparison to LR2. I tried both at version 2 but LR was much better. I've heard the Aperture 3 got a lot of much needed updates and now might be on par with LR. I'm now using LR3. Tough to compete when the whole photo suite is basically Adobe. LR, ACR, Bridge and PS makes for a solid workflow.