I have a 450 cube that has a problem with panther. I have reinstalled it many times, with the same results. When I try to open mail, it just sits in the dock...no window, nothing, and I have to force quit to shut it down. There is also a bookmark problem. When I try to save a bookmark (safari, etc.) it fails the first time and I must do it twice. Then I have two bookmarks. It also often fails to open a new page and I have to do that twice. It works fine in Jaguar. Any ideas would be appreciated.