I am also having crazy trouble with 3 blades,   They work... but only about 50% speed all things considered.

I have tried basically everything, and I am safely rule that they are not running to hot, they are not under powered, they have a strong high speed internet connection and at least on the blade config itself, they are configured correctly and I can mine on several pools.

However, they restart every 2-3 minutes on they're own, and on the config windows they show zero hashrate and zero accepted shares.  Though they download around 300 before restarting, and resetting the counters.    Chips all read OOOOOO.

I had a mini-break through that has now resulted in more confusion.   Just an hour ago I re-configured my third blade to mine on Deepbit.   Through the normal 8332 ports.  And holy crap I got accepted shares and a slowly growing hashrate (4ghs) on the blade config.  But after 4 minutes the config page will not load (after hundreds of retries) and yet I can still ping the blade with only a 1-2ms return.   So why the config page is too slow to be reached I don't know.     And after around an hour deepbit is showing 6.7ghash.   So I can't see what is on the config, but I can only assume that it is performing exactly how it did before and I can't get back to the config page to try the 'high' speed setting.  And if it is resetting on its own it would go back to low anyway.

I am very confused, and I bet the diff will be 1.50 before I get this sorted out