Slight thread hijack but I have just installed fog 1.2 as I needed more image space (sysprep worked but things like graphics drivers proved an issue)
The problem I have is with Dell OptiPlex 390s they boot from pxe show the menu but then they just go black with a flashing underscore in the top left corner. EDIT: better description blinking white cursor.
They used to work with the previous release of fog. All the bios settings are correct etc. If I escape out of the PXE it boots from the hard disk OK. problem is I have all our machines set to boot from nic then boot from HDD. I have updated the bios and removed all other boot options except from NIC and HDD.