Admittedly ultra-noob, but believe me that I've done my research before asking.
1. I understand the cool concept of double-spending prevention by all nodes agreeing on the block (and tx order), but only when it involves discrete, indivisible bitcoins. I fail to understand it when we're talking about fractions of bitcoins. Can you give me an illustration of a double spendning attack with fractions of bitcoins? what does it mean? do I have to spend exactly the same amount? or a fraction of a coin I already spent?
2. Where can I look for the code that scrutinize a newly arrived block? Is it part of the client I downloaded? I want to have a deeper look in it, and maybe that can shed a light on my 1st question.
Thanks, good luck with this amazing technical-economic experiment, Ido