The question of censorship is a legitimate issue on this page, though it looks like one huge list of wikilinks at this time. It appears there were three separate incidents of "cutting" which occured on the American broadcast, but did not occur on the Canadian Broadcast.
The Sally Field acceptance speech
The Katherine Heigl expletive of surprise
An off-color joke made by Ray Romano
While Wikipedia is not a newsroom, and perhaps the information would best be gathered at Wikinews, this issue deserves some treatment, and this page space is exactly where that treatment belongs. It's not a partisan issue, because IMHO the broadcaster in each case can be said to have acted in the interest of preventing certain words from live broadcast. Partisans might argue the broadcaster was trying to (justifiably or not) stifle a certain idea (the mothers-antiwar link), perhaps with some merit.