There's a new Fourth Amendment case before the Supreme Court (link). In brief, the police forced their way into an apartment because "they smelled burning marijuana" [good reporting would say "they said they smelled..."].
What really angers me is that I know exactly how the so-called "conservative" justices on the court will rule. The great defenders of the Constitution, the great Tea Party favorites, Scalia and Thomas will side with the police. Yes, they will side with the government. It's always this way with these people: that's why I use the phrase "so-called", because they simply do not believe in limited government power. Thank God to Kagen and Sotomayor for standing up against this attack on our Bill of Rights.