I read the same thing while I was in the middle of doing an
acts_as_nested_set forum implementation myself, and it did give me
pause. But, since I was already going down that path rather than using
acts_as_threaded, I decided to press on. I was able to successfuly use
acts_as_nested_set for my threaded forum app, which I started yesterday
and more-or-less finished today. I am happy to say that all of my
tests run, and it seems to be performing well. My particular forum has
multiple roots as well as multiple forums, and so far, I have not seen
The directions I followed were from Bob Silva's site I.nfectio.us, and
here is the link:
Bob is the author of acts_as_threaded as well.
Hope this helps!