All OK for me so far.
Mind you, if I ever have to create a long post, email or the like, I will always do it in Word first then copy/paste into a forum or attachment in an email. I used to advise all my patients to do this as they would often complain of the pain in losing a long email as they were typing.
I am not sure whether or not a forum post actually exists as you type it or only when you actually submit it. I know an email didn't, maybe things have changed.
And yes, technically a Word document needs autosave on to be safe.