I can only remember two videos out of about 500 that were dropped. One, cause the product's name changed, and another cause they mentioned a competitor too many times and that made people nervous (we reshot both successfully). I've had to edit out some stuff, though. Usually a swear word, competitors, unreleased technology, and stuff like that.
Lemme guess -- the vid where a competitor was mentioned too often was the vid about MSN Search.
...Just a random guess...