The Disappearance of 'ne' in French.
Mind you that this only applies to spoken French, however linguists
predict that the 'ne' in negation (as in 'ne' and 'pas' or 'ne' and 'que')
will disappear from the French language in the near future. For example:
This is true for Québec and France (I am unsure of other Francophone countries, but I'd imagine
that it'd be the same for...say, Switzerland).
See also: French adverbs of Negation