For about six months, shortly after a quick cycle of hard drive upgrades, the keyboard and trackpad on my MacBook Pro have occasionally frozen. Last spring I backed it up and erased the hard drive, took it apart, checked all the connections, and restored everything. No luck. The lockups were getting worse, until last week it would sometimes freeze up through reboots seven or eight times before it'd boot in workable shape. Then I wiped the hard drive and rather than just restore the full drive from backup, I installed a new version of the system and only copied over the Documents folder, then went through the twenty-hour process of resinstalling programs from scratch, on the off-chance that there was a scrozzed prefs file somewhere.

No luck. So yesterday I wiped the hard drive again, reinstalled the OS from the install DVD, and today took out the forty-some tiny screws and re-seated all the connections. So far so good. But if that doesn't work, we're looking at using a hammer.