I'm running a macpro 8 core with 12gb so that shouldn't be a problem.
I will instaal from scratch again tomorow and rebuild the db again to see if that helps.
Only did that twice ;(
Well, I see you have a more powerful system then I do, so that may not be the problem.
The only thing I can think of is did you install from a CD or down load the program?
I did a down load myself (trial version) and then purchased a license.
Also did what Apple suggested and changed the name of Aperture 2 before installing Aperture 3.
Now if you down loaded the program may be something happened during down load.
Buy anyway just a thought.