I have Aperture 3.1.3 and Lion installed on two Macs with no issues or problems.
After purchasing a New IMac from the Apple Store, I was very happy, I thought it was a great computer. I was wrong.
When I downloaded the new Lion system and the Aperture I have had nothing but problems. In Dashboard, I get widgets that pop up that I did not download. In Aperture, I created my one and only project only to have it crash every time I try to adjust the music levels. While I've tried to get help from Apple both online and via telephone ( 3 times for over 2.5 hrs.) it has been fruitless. Finally, I had a Apple tech contact me and say there is something wrong with the software, but I'm still out in the cold about what to do.<div>WARNING STAY AWAY FROM LION!
STAY AWAY FROM APERTURE!