I'm usually a really big fan of the Mac OS X Software Update app. It's easy to use, automatic and mostly nonintrusive. But after applying today's update, my shiny new Mac Book Pro stopped booting!
Each time I rebooted, it beachballed on or right before the "Starting Mac OS X" progress bar screen. Fortunately, a kind soul on the [Apple forums](http://discussions.apple.com/thread.jspa?threadID=477248&tstart=0) provided a solution - reboot into "safe mode" and move everthing out of `/Library/StartupItems/`.
This sucks. I'm always encouraging my friends & family to switch to Mac, and everytime I run into shit like this I feel like a clown.