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I get this.

It is the sudden motion sensor locking the hard drive. I wish I could adjust the sensitivity of the sudden motion sensor so it takes more than just lifting up the MBP to cause this.

Extremely irritating, because it locks the hard drive, so if I'm watching video it freezes temporary.

My previous gen MBP didn't do this - so obviously Apple still have some refining to do with the sudden motion sensors.
 
HDAPM can work for most everyone, even those (like me) who thought they could not get it to work on their notebook.

The HDAPM problem is that the original instruction set that most find on the web is not exactly correct.

seriously, go read UPDATE 6 of my blog...

For the rest of you who are new to this issue, go and read my entire blog article, which will explain everything.

Would you mind reposting it here? You give some instructions that you later update and say were not correct.
 
Would you mind reposting it here? You give some instructions that you later update and say were not correct.

UPDATE 6 (12.20.08-FINAL UPDATE!): I got an email from "Felix" who provided the final piece to this puzzle. He recommended that I place HDAPM in a slightly different location: /usr/bin, NOT /usr/local/bin. After doing this, HDAPM continues to work across reboots and restarts.
 
I just took my MBP Late 2008 to the apple store. They said this was normal. They said the hard drive acts as a gyroscope in there and has some give left and right. It's designed to do this. So if you're hearing a slight beep/click sound when you pick up your computer or set it down, you're probably ok.
 
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