Ha, welcome to my problem all along..,  I so far only have been running stable on BitMinter. Al other pools I've tried it runs for a few hours then pool reports it's at ~3GH/s (from 350gh/s)
Have not been able to resolve it either.., even with auto restart of proxy and miner timers.

Ive been having trouble with my bitfury staying connected to the pool during the last 2 days - it is constantly dropping to zero hashrate from anything from a few minutes to a few hours. http://eligius.st/~wizkid057/newstats/userstats.php/17ztqVKWEg1j25D3AoX87W66rYJApasPLK

the interface for the miner says it is stable and never reflects issues. It seems to work again if i click 'start miner' but that isnt solving the constant ups and downs

Use thier Kncminer port, its 12234 I think, it starts at a higher difficulty. I have run my miners on it the last 4 days and its been stable.

I would verify that port but the eligius main site is down for me.

Yes, there's a reason many oem's are pulling out of retail.  There's tremendous workload associated with providing quality customer service, a solid refund policy and fast shipping.  Adding credit cards has increased our administrative costs due to the amount of credit card fraud.  In order to honor refund requests, I've sent millions in BTC and USD.  In addition, the presale market continues to set lower bounds on price, despite the fact the we ship and they dont.  Price fluxuations in BTC drive ROI models crazy, putting pressure on us to lower prices.  Leased haspower is at least currently demanding an attractive premium over offering retail.
MBP was and still is focused on building mines.  Retail sales has been a great way to involve the community, and initially generated some good capital, though we haven't done anything like the sales of KnC, Cointerra, etc. and in the face of 28nm, our product has become "legacy" equipment already.
All this being said, we still have an idea of what we are willing to sell our hardware for, and that is reflected in our prices.  I dont typically respond to price wars, nor do I ever engage on forum arguments about ROI.  The price point each miner will pay is a personal decision and everyone has a different strategy. 
If my prices don't appeal to you, I encourage you to shop around!  But I hope this is not perceived as a.lack of support to the community.  I remain committed to bringing our next gen products to this community along with continuing to field the best customer service and support team in the market today.

While I would also love to buy more gear from Dave at bargain prices, I have to say I find it quite odd that he gets so much flack about not slashing his prices in this market when the remaining supply is limited. He and his associates took the risk, put in the blood and sweat equity to make it happen and they have every right to operate as they see fit. I consider Dave one of the best suppliers in bitcoin mining market, having dealt with just about everybody. Dave worked day and night to deliver the first batches of hardware. He ran a transparent operation and busted his ass to take care of his customers. I think if everyone really knew how much work it is to do what he has done in the past year there would be less outrage about pricing and more appreciation for what he delivered.

Yeah that's clearly Bitmain - aka antminer.