Unable to install security update

[yg17]

I finally got around to installing the security update 2007-004 on my PowerBook (so yes, this is the PPC version) and I get this error after it downloads in Software Update:

The update "Security update" cant be installed
The digital signature for this package is incorrect. The package may have been tampered with or corrupted since being signed by Apple.


I've tried downloading 3 times to no avail. I'm guessing this is a problem on Apple's end? Is anyone else having trouble downloading it? Thanks

 

[dartzorichalcos]

Did you download from Software Update or Apple's website? If you downloaded that update from Apple's website, try using Software Update for the update.

 

[yg17]

Im using Software Update

 

[dartzorichalcos]

Im using Software Update

Then try to download the security update from Apple's website and see if that works.