I've noticed that all the machines that receive my image all have the reference machine's serial in the summary page. Each machine gets a new GUID fine, but the serial remains the same, and it's playing havoc with my serial matching registration rules... Has anyone come across this before?

Agent (11.4.2) installed in the image, and the following run at the end of the imaging just before sysprep:

zac unr -s
zac fsg -d
zac cc
deleting all inventory XML in Novell\ZENworks\work\inventory\*.xml
clearing imagesafe data with bin\preboot\ziswin.exe -c
deleting the DeviceData and DeviceGUID files in conf
removing the GUID from HKLM\Software\Wow6432Node\Novell\ZCM\PreAgent
deleting bin/conninfo.dat

Still no joy.