My coworker had a strange issue where his MacBook Pro would boot up, run just fine for about 30 seconds, and freeze up. The cursor would still move just fine, but you couldn't access anything. SSH sessions into the machine would stop as well. I was baffled, trying to remove Parallels Workstation, thinking that kernel extension had issues, but to no avail.
Turns out that Security Update 2006-003 on Intel managed to mess around with a few services, causing them not to work properly, or abort. In this case, RemoteDesktopAgent would hard freeze a system as soon as launchctl would start it. Remove it from /System/Library/StartupItems, and all is well again.
I wonder how long til Apple releases a Remote Desktop update, or if this is something that is "fixed" in the 3.0 paid upgrade of Apple Remote Desktop.
sigh.

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