Sea Knight down. And more.

The most striking of these downings was a CH-46 "Sea Knight" double-rotor helicopter which went down last week. The military initially reported that it went down due to "mechanical failure," but then a video surfaced on the internet which clearly shows a missile of some type which strikes the helicopter from behind, causing an explosion. The video tracks the smoking helicopter all the way to the ground. Faced with this evidence, the military still stuck to their "malfunction" script, which could be summed up as: "Who are you going to believe: the Pentagon, or your lying eyes?" Finally, they admitted just yesterday that it indeed had probably been shot down.
(HuffPo)

Having just finished reading listening to Charlie Wilson's War (see sidebar), I've been thinking pretty much the same thing Chris Weigant's saying in this Huffington Post piece - including the part about the uptick in helicopter losses might be just a fluke.

Might be. Still, acquiring the means to shoot down helicopters was instrumental in the Afghans' success in defeating the Soviet Army in the 80s and a similar development in Iraq could be devastating to the US in Iraq. This development deserves a lot more attention than it's been paid by the press.