This may sound strange, but... I noticed a duplicate of the iPhoto icon in sort of washed-out form lurking just behind and above the Mail icon on my dock. I was able to move it to the desktop. When I click on it, iPhoto opens. When I click on the iPhoto icon in the dock, it says it can't open because the app is already running. Vice-versa, same thing. Both versions of the app are the same size---1.13g. Currently, I have the iPhoto icon on my dock and on the desktop. Can I somehow inadvertently have duplicated the app? And if so can I safely delete one of the two? Either way, if I click on either one, iPhoto opens. And how the heck could I have done this? Thanks.