My problem with the all O's but not hashing:

There was network traffic, and work received sometimes when i put a plain tcpdump on it with headers.  On visual inspection of the board the pic pads were off on 3 sides, I figured couldn't hurt, and fixed it.  On first restart same thing.  I was working against getwork wallets and a slush proxy.  After dicking with it for awhile I put -A option in tcpdump and noticed json returning "Bad credentials".  I sucked it up and loaded bfgminer with the stratum proxy, and have had no problems.  I get the feel the miner is not updating the userpass because the auth hash never changed no matter what i did.  No problems besides killing a rail on a cheapo 220w psu.