One of my dear intrepid readers has reported that the OS X 10.4.7 update rendered his 2.0Ghz MacBookPro inoperable. To the extent that the machine rebooted after update and hung at the gray screen…forever and ever and ever. After the hang, single user mode didn’t work and safe mode also failed. For reference, this is the same machine that inspired the Panic! At the MacBook Pro post.
The only way to get the MacBookPro operable again was to reinstall OS X. Not good at all.