I've been mining for the last 10+ days stable@ 470 Gh/s with the old firmware on a Ubunutu 13.10 on Laptop w/Cgminer 3.09h2 , just can't get 3.12.3 to run like it was intended until the FW is out ,as per Ckolivas advice. So put the RPi for FW updates and that about it.
Indeed, it's really bugging me that the firmware is still lagging behind the driver that I wrote for it... 
Looks like HF-Engineer has been muzzled by his "libertarian superiors" from commenting further on these boards. Also, looks like Scamfast will not release much anticipated firmware update due to the fact that they are going to "try" and get another product cycle out of 28nm golden nonce with an updated PCB motherboard and the updated firmware. Shameless. Looks like the marketing scumbags at scamfast are taking after US car manufacturers of the early 80's with planned obsolescence, designed to fail engineering forcing consumer to buy again prematurely. Scumbags haven't even begun to ship sierra to any notable degree and are only shipping early batch 2, and yet they come out with "improved" Yoli board which does 2x the hashing of current boards. I bet they already have these boards in house and ready to go but will not push them out with current orders because they are a bunch of greedy scumbags. Scamfast is finished. They have burned their goodwill with community. No more. Looks like they jettisoned John Skadronis(sp) head of marketing and VP. Guess he wasn't willing to go along with their latest scam
http://hashfast.com/shop/yolievo/
https://bitcointalk.org/index.php?topic=262052.0
who are you? the forum police. it is the place to discuss this as the thread u referred to is dead and dying, along with this one I might add since Phil the engineer was disappeared by CEO Eduardo. Everything I stated is germane to this thread and the matter at hand, specifically the lack of an updated firmware for these poorly performing boards and precisely why that firmware won't be released: the scammers and marketeers at scamfast are trying to rake their customers over the coals again for just a few more coins. Been there and have the BFL shirt to prove it. Nice try eduardo. You and your ilk are the reason bitcoin is in such trouble. Eating your own does nobody any good.