I upgraded the hard drive in my iMac to a larger one and upgraded to Leopard. Now every time I try to download something I get this message: /Users//barrydunlap/Desktop/4tvmS0Z1.exe.part could not be saved, because you cannot change the contents of that folder. Change the folder properties and try again, or try saving in a different location. I have changed the download location multiple times but no help. And ideas??