it takes 48 h to recover my powerbook after i made an attempt to
update computer from osx 10.4.6 combo to 10.4.7.
i downloaded that 10.4.7 combo update directly from apple's website.
then i pushed installation button and nearly at the end of process
installation window said something like "installation error... blah
blah blah". i tried 2 more times. then i figured out that system was
already broken. and at the end of the day (night) i found my self
reinstalling completely all system and all programs.
that's a life.