When I close Aperture application and re-open all the adjustments made to my photos they are gone. What am I missing? I thought the adjustments were auto saved as in iPhoto. Need help!!!
You're right the adjustments and changes are applied to the library as they are made.
Is this something that just started happening or is this a new Aperture installation?
If it has just started happening and nothing else has changed on your system then you should start with the Aperture 3:Troubleshooting Basics. I'd specifically look at doing a permission repair and library rebuild.
If this is a new installation where is your Aperture library located? Internal or external disk? If it is external make sure the disk is formatted as OS X Extended.
In either case post back with the specifics of your system.