Hello,
Today I worked on a bunch of tiffs in photoshop and when I was done I opened the folder in PM 6 and they all looked like the original files and didn't update. At first it scared me because I thought I had lost hours of work but then I realized PM just wasn't showing the current versions. I restarted and they still looked like the older versions. Maybe a cache issue? I then opened PM 5 and they were correct. Working on a Mac Pro OS 10.11.6, attaching a screenshot with both versions of the shot, the one with the exit sign is in PM 6.
Thank you!