I noticed in the "Duffless" episode (I think), there's a line where Barney says "That looks like Princess Di!/Oh its just a pile of rags"
I remember being surprised by this line when watching the DVD boxsets. Was it cut after Diana's death?
The line has still been in there when I've seen it.
The Homer Simpson v New york episode has played on C4 uncut AFAIK, despite featuring the twin towers.
Not completely uncut. There's an exchange between grumpy residents in the towers which is truncated. Then again, they must've got on at some point because they put up washing lines