One other thing that I found out is that the trunk update from Squeak4.5-13680.image seems to create corrupt files in the package-cache. I use the following batch script to verify:

#!/bin/bash
cd trunk/package-cache
for f in *.mcd *.mcz
do
	unzip -t $f | grep "No errors"
done

Most but not all of the files in the package-cache seem to be corrupt.

I would be interested if others see that also.

Cheers,
Bernhard