,One observation: When ever I kept my downloads ON, there used to be crash of Unity 3.0. 10 times continuously, it happens, and then after the 10th restart of the system, I forgot to resume my downloads. Miracle, then happened, that the unity did not crash at all. I think it has got something to do with RAM of our PC's and laptops. May be there is a clash between some memory slots in the RAM which the download manager and Unity, both try to access. So try not to download when you are working with Unity.
Tip 2: Continuously make a backup folder of the game you are working on. First copy the entire folder, and thereafter copy just teh scene files and the materials folder to your backup folder.
May 24 '11 at 06:42 PM