The USB miner's are past their prime in terms of hashing power, the difficulty is too high. Your better off turning them to an altcoin and trading into BTC.
I'm aware that Block Erupters have low hashing performance, but my stats should still update and my
BTC should still be increasing slowly but surely at just under a dollar per 24h. I do not want to change my mining application because I favour BitMinter over anything else. An eBay user is currently cloud hashing for me at around 58Ghash/sec and it'll be interesting to see what happens.
Any ideas what's happening to my stats people?
Probably nothing happened, just variance...