I had my first faulty duox2 the other day, installed it in a 1.2 and it would try to boot 3 times with no luck.
I threw in another chip and it worked fine.
I still have the old chip i need to check all the chips are soldered on ok, i'm sure its something simple i just need to sit down with the magnifying glass and see if i can get it going again.
I installed a 1.4 today and the red light does not flash but it boots the executer bios fine. This is the fist time I have seen this behaviour.
Odd, I still love the duox2 chips tho