Last night I completed a customization of my effects preset list, which included the moving of auto enhance from the quick fixes folder. Well this morning I noticed the auto enhance button was not working with RAW files. So I wanted to figure out how to fix it and started with the thought of my most recent change, the customization of my effects list. I noticed the Adjustment Chain Presets.plist file within the ~/Library/Application Support/Aperture folder, and decided to just delete it.
My hopes was that it would just reset function of the auto enhance button function with my current customized effects preset list still in tack. Well need less to say, the button is working again, but it also reset my effects presets list to default and deleted all of my installed presets. If someone knows of a way to allow complete customization of the effects preset list and still have the button work, please let me know. It looks like if the Auto Enhance Effect is removed from it's default folder, the button stops working. I'm also not in the mood to edit and play around with it's .plist file to see what works.
Update: since I'm starting over from default I decided to once again remove the Auto Enhance Effect from it's folder and restart Aperture ~ Once again, the auto enhance button does not work