Citation?
It was never changed. The ruling has always been "false" speech that incites violence, which makes perfect sense as I would want someone to yell "fire" if there was an actual fire approaching:
http://en.wikipedia.org/wiki/Shouting_fire_in_a_crowded_theater
The paraphrasing does not generally include the word "falsely", i.e., "falsely shouting fire in a crowded theater", which was the original wording used in Holmes's opinion and highlights that speech which is dangerous and false is not protected, as opposed to speech which is truthful but also dangerous.
Here's the exact quote from Schenck v. United States:
The most stringent protection of free speech would not protect a man in falsely shouting fire in a theatre and causing a panic.