It has been a while since my last reply, but I have been on holiday for a couple of weeks.
In the meantime we got (finally) BIOS updates to support the new Intel E0 stepping. I uploaded them to our local FTP server.
IP35P: (update 10/20)
IP35 Pro: (update 10/20)
IP35 Pro XE:
I will update this thread if we get new updates.
Note it is important to make a CMOS clear after the flash. Then boot, go into the BIOS and load the optimized defaults.