iPhoto will not open photo for editing
My MacMini HD was getting dangerously full so I moved my entire iPhoto library over to my MiniStack external drive. Since doing so, I am able to display mulitiple photographs within their folders, but if I click on an individual image to open for editing, a plain black screen opens with no photo. Same thing occurs if I select 'slideshow'. This is very worrying. Advice please!
Mac OS X (10.6.8)