David Bernstein over at the Volokh Conspiracy is seeing potential signs of pressure on the housing bubble.

Glowing caffeinated beer. Free stomach pump included with order.

I performed my first sensor cleaning on my 20D today, somewhat overdue (I've been changing lenses outside a lot recently, and it showed badly). I ended up having to do it twice, once with a large brush and once with a small brush. I think I still missed a fleck in one corner, but it's absolutely tiny, and I can ignore it until more junk accumulates.

It was, in a way, an absolutely terrifying experience. Screw this procedure up bad enough and you've just disabled or destroyed a thousand dollar camera. My nerves were not helped by the visibility of a thinly streaked sheen visible on the sensor in sunlight. At some point, I may do a liquid-based clean, but not now. Like everything else that tends to affect me this way, it only started catching up to me when I was doing the testing. Actually performing the cleaning bothered me not at all.

The exact timing of coincidences is everything. At exactly the same moment that I clicked on a link, the computer gave a sparking sound and powered down. I glanced, bewildered for a moment, at the mouse, before my brain reasserted itself and I started going down the checklist of possible faults. Surge on the UPS unit (I keep expecting trouble because the wall socket to which it is connected doesn't have the third ground prong actually connected to anything)? No, the UPS is fine; the monitor still has power.

I get up, disconnect the power cable from the computer power supply, and pull the side off of the case, expecting the worst. My personal machine (not the server) is now water-cooled, and my first attempt at that ended in disaster. There is the distinct smell of scorched electronics, but no water to be seen anywhere. As I pull tubing and cables from one side to another, inspecting, I feel heat radiating at a distance from the power supply. Gingerly, I touch it, and a sharp buzzing commences. Startled, I pull back, and stare stupidly at the disconnected power cable before I recognize the sound as the insects outside.