I recently tried dragging a rather large photo (3000x2000 or somethinig like that) onto the photoshop icon to open and it wouldnt open, The programm began to start up and then got hung up on reading preferences. It kept on doing that everytime I tried to open it after that. I wanted to know what could be wrong with it. I rebooted, did a repair permisions, still no luck, Any ideas?
Are you only having the problem when dragging the image onto the icon?
If so then just open it up with the open command in Photoshop... if that doesn't work try opening it in Preview and see if that works... if so then try resaving in the same format if you can if not.. try reloading the image onto your computer.
Digital Light Graphics And Animation