Via Net boot (10.7.5), running Casper imaging on a new computer, which is not in the Jamf database, once passed authorising the software to run you get "Casper Imaging quit unexpectedly" message. Ironically this doesn't stop the process from running as you can choose to ignore.
If the computer is in the Jamf database then Casper imaging works fine
Casper Imaging 8.52. works fine for both scenarios.
