I've been happily using LR5 but last night as I'm working my through a through bunch of images, editing etc..I would Forward Arrow> to the next image and the display shows me 2 images overlaid..usually the one adjacent to the one I selected with the Arrow Key.
It doesn't stop..rebooted, repaired permissions all the usual stuff..still doing it and it's shutting down my work..
Anyone know what's going on here? Can't find much about it on the web. I am in Lightroom 5.0 on Macbook Pro 2.9Ghz i7 with 8gigs of RAM, running Mavericks 10.9.5 .