I was also having the problem where the Office 2008 12.0.1 update installer
was failing with an alert and telling me that there was nothing to update.
I tried all the suggestions already put forward here (removing,
reinstalling, etc.) and none of them worked.
I don't like guessing, there's got to be a reason that the update
installer thinks there's nothing to update
So since I know DTrace and Leopard now has DTrace, I wrote a short DTrace
script to examine all files that Installer was opening as it happened:
#!/usr/sbin/dtrace -qs
syscall::open*:entry
/execname == "Installer"/
{
printf("filename=%s\n",copyinstr(arg0));
}
and ran it. Turns out that when the Installer gets to the point that it's
going to start installing the update, it actually tries to update the
virtual disk that the update is mounted from and running out of, instead
of the hard drive, despite the fact that I told it to update the hard
drive during the installer dialog. Same thing happens when the Microsoft
Office 2008 DVD is mounted when the update installer is running.
So, I copied the 12.0.1 update installer from the virtual disk to my
desktop and ejected the virtual disk and the Office 2008 DVD.
Reran the 12.0.1 update installer from my desktop and it working
perfectly.
Problem solved.


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