I have got problem with my friend's iMAC G5, that Safari won't launch on Mac OS X 10.3.9.
What I did was below
1- Go to Hard Disk/Library/Receipts and delete all files referring to Safari
2- Go to Home/Library/and delete the folder Safari (I will lose the bookmarks)
3- Then I downloaded Safari from the link below:
http://www.apple.com/support/downloads/safari.html
But still Safari won't relaunch.