To my knowledge I didn't change anything. Started taking some pictures and got this on my stock camera roll. Only on some of the ones I took today, not all.
Posted via Nokia 6230 (I play snake)
all of my stuff is landscape views of broken highways and bridges.
Yup, that is definitely corrupt files. I had issues with SD cards on the Note 2, the S4, and the Note 3. I guess Samsung hasn't learned and is still frying SD Cards on the S5. Is your card by any chance a SanDisk one? They seem to be the most affected.
PS: After my experience (and there was an article about it on AC, too, a while back), I STRONGLY suggest you never store your camera pictures on SD card and always try to back up to Google or Dropbox or at least your PC.