Technically Bargraphics and I had problems. I had 1 defective chip, replaced by RMA (took 1 week, due the RMA policy that I don't care for). Both Bar and I have had problems with the hosted service in the beginning and I had a failed miner which eventually got replaced.
You don't count since you fixed your problems. I had one defective board at start too. Did RMA, got it fixed in 5 days total.
COUNTING PEOPLE WITH FAULTY UNITS/PROBLEMS:
1) retard The Avenger
2) CYPHER
3) FUKT
4) timmmers?
5) Puppet
6) ...*please continue the list*
6) Bargraphics
7) Mota

All the people posting on the KNC support subforum
Bar doesn't count. He HAD problems and got them fixed. As for you i don't know. Do you still have problems?
So we are stuck at 5 people with problems right now?
Got problems too. Firmware has not fix error => 3/4 cores working, 1/4 dead.