I'm not sure how this system works. Sending something bigger than 0.01 (for example 0.10) it asks for a 0.01 fee (why?). And if I want to send 1 BTC it asks for a 0.04 fee, 2 BTC asks for a 0.05 fee. I've disabled it in options, so it's kind of weird in my opinion... Especially because the fee just will be added on top of the 50 BTC that is earned by finding a block.