I checked when the McManaman incident occurred and the rule has not been changed as far as I could tell.
There was an announcement about the non-interference rule as a consequence of the McManaman tackle. That's how I know about it. Perhaps you missed it..?
Here PSF. I read the news on another website which talked about a change of ruling. Here it is termed an agreement and I guess the website I read it from may have misunderstood it as they were reacting very quickly. This is more considered: http://www.getreading.co.uk/sport/f...cmanamans_horror_tackle_went_unpunished_by_fa