Me too.
The photos did not show the line on my phone. But when I open the photo to "view" it still shows the line. Also, within the margins of the line, the original photo appears to be a thumbnail hovering within the grey bar. And on the split, it's the right edge of the photo...as if the photo has duplicated itself, split itself and then placed the thumbnail. I can't seem to preview it without this anomaly. It's in over 400 of my photos dated June 20 2016 and forward. Already deleted from phone after import.
I run a summer camp for the city. I'm responsible for photos. All of my summer camp photos are ruined. We share them with the parents.
Totally bummed. Really disappointed in Mac for releasing updates that do this. For the average user, it's making me want to go back to windows. Super frustrated.