I have a question, I did some trading and I turned 1 bitcoin into 1.5 bitcoin, now I want to take that 1.5bitcoin and put it into my bitstamp account. But when I go do that I get a message right before confirming it, that they will get 1.5bitcoin, and it also says "You can pay at most 1.515" why is that mean exactly? I don't want to be in debit to anyone right now?
There is no way to ensure the network is in precisely the same condition when it processes the transaction as it is in when you form the transaction. To prevent transactions from failing unnecessarily, the client generally applies an extra 1% "slush" to ensure the transaction goes through. This could result in a transaction leaving you in debt. I don't think there's currently any way to change this behavior. (You could always transfer 1% less, I suppose.)