jcool
However I'm afraid of rebooting.. oO
i got my 1st C1 errors with this board on flashing, My second came not long after on rebooting.

You seem to need to treat the board a little rough & pull the battery out when it misbehaves. I'm not convinced that it's a bios issue, i think that the board seems to be liable to DMAi corruption, pulling the battery seems to be the most effective way to clear it & force DMA rebuild.

Since using 12.09/official i've had a couple of occasions where I've had a 50h post code error , which is usb. I've had to pull usb pen drive. Now I've not had that up till now??? spooky.

luck