Macshiny
I just lost a good 12 hours worth of work after Macshiny deleted "Duplicate" pdf files that I questioned whether they were duplicates or not. Tired, not thinking, I clicked the button to finish the process of cleaning up duplicate files (instead of just choosing one & experimenting). I had my folder up (which contained the original pdf files) so I could watch in case the original copy disappeared. Stupid me... my entire folder emptied right before my eyes.
iMac, iOS 9.2.1, MacShiny