hi I have Lightroom 4 on my Mac Pro. Lately I noticed when I'm editing between lightroom and Photoshop a line appears throughout the photo. yesterday, i did an export to jpg and noticed the line throughout the photos as well. has anyone else had this issues and how can I resolve it. I tried downloading the free trial of Lightroom cc and I'm having the same issue plus Lightroom has been freezing and crashing a lot since I started to see the lines throughout my photos.
It would be good if you could post one of those images for us to look at. But "usually" lines through images is an indication of a hardware problem. It could be a hard drive going bad, or a faulty USB cable if you are using one. Lightroom does not make any changes to your images. So something else is most likely causing the problem.