51% attack, obviously. It is like that when you allow one mining pool to have more than 51% of total hashpower and you have no clue who really
is behind that pool. You should at all times asume they
will abuse their power and it is so because most people when tempted hardly ever manage
to permanently resist the temptation.
https://en.bitcoin.it/wiki/Attacks#Attacker_has_a_lot_of_computing_powerDistribute your hashing power so that no pool is even close to 51% of total hashpower.
I don't know if you're trolling, or if you're serious. If you are serious, I have no idea what the hell you're talking about. There's no 51% happening right now. There's no double-spending going on. Plus I don't even mine at 1gh.com (which you're referring to). I've never lost a penny from any pool. This is an
EXCHANGE issue, NOT a pool issue.
It is an exchange issue caused by pool issue. In other words, pool you idiots helped to achieve over 50% of total hashpower (for what you pay an
extra 2% pool fees, bravo!) scammed BTC and most likely MAX from Bter.