I'm a professional using my MBP for work, AutoSave in TextEdit is overwriting my original files. I've recently installed 10.8 on a partition on my SSD, & have downgraded (yep!) to it some time ago to get better used to it (I have no PPC apps, but still keep SL on another partition of my 512GB Crucial SSD) I've tried the Terminal Hacks to disable AutoSave on TextEdit (hint: it needs two Terminal commands for TextEdit), but apparently Apple decided to bugger everything up in 10.8.5, as the hack doesn't work. I've set my mac so that TextEdit will open .doc files, it's still faster than opening them in Word even though I have an SSD. Here's the problem: 1) After opening a simple .doc file in TextEdit, I convert it to Plain Text without saving. 2) As soon as I press OK, TextEdit overwrites my original .doc file, destroying it without my permission, & turns it into a .txt file without my ever having used the "Save" or "Save As" menu item: This is unacceptable behaviour, a step backwards from TextEdit 1.6 that existed on SL. It's one of the many reasons many working pros are still worried by the post SL OS releases, worried that our work is destroyed without our knowing. (Lloyd Chambers has articulate explanations on his site, I won't delve into it here). I only noticed 'cos I had Finder open at the same time. If somebody knows a solution I welcome some help, no "Versions" though please (the usual Terminal hacks referenced here on MR or on OSXdaily do not work), otherwise let it serve as a warning to fellow forum members.