Hi there, The other day I opened iPhoto from the dock only to find that when I clicked on it the icon disappeared. There is now a gap in my dock where iPhoto should be and when I rollover the gap it shows up as iPhoto, but without the image. The same then happenned with System Preferences. I thought that it may have sorted itself out when I turned off my computer for the day but first thing this morning when I switched it on - the same 2 icons are gone. They still open the apps, I can quit out of them by right clicking and go into options menu etc... I attached a screen shot if it is of any use. Is there anyone who may be able to shed some light of this for me? Would be greatly appreciated. Am using Snow Leopard also. Thanks guys.