Hubcoin source code based on Ethereum.org token example, which unfortunately contained a bug.
It wasnt allowed to send all balance to another wallet.
(at least 0.0000001 part will stay at old wallet and lost.)

That bag is small, but it was enough to break down CoinExchange.io deposit and withdraw system.
If was hard to find the reason, but now we know it so can fix problem and enable deposits/withdraws on CoinExchange.io soon.

I also sent a commit to Ethereum master branch (https://github.com/ethereum/ethereum-org/commits/master), it was checked and accepted.
So example on http://ethereum.org/token will be fixed soon too