I'm a bit concerned (okay, obsessively so). I bought a dv8408us from CompUSA back in December. It's a great unit, no keyboard problems. However, yesterday, the fan started making a funny noise. The best way to describe it would be it sounds like a piece of paper hitting the blades of an oscillating fan on a quieter scale. Or, another example, the hum from a window air-conditioning unit. It starts a few seconds after turning on. I bought a can of compressed air today, cleaned the vents. It's still making the noise. I've attached a file (.wav w/.mp3 compression). See what you think. Am I being overly paranoid?