I was trying to put a Mac OS X 10.6 image onto a USB stick to install on another system. To do this, I attempted to do it from a Mac running 13.6 and failed with a message like this when restoring the image to the partition:
Could not validate source - Invalid argument
The operation couldn't be completed. (OSStatus error 22.)
It turns out that Disk Utility is pretty broken at this. What you’re better off doing is using
asr. This utility is what Disk Utility does under the covers anyways.