No matter how secure and innovative would be
Bitcoins, they are just some bytes on a digital
storage medium and they can be copied as well as
any digital information.
We’ve thoroughly studied the Bitcoin client from
within and have found an almost imperceptible but
very significant flaw (associated with the commission),
using it we have committed a Bitcoin transaction
in which the recipient has received more Bitcoins
than the sender has sent.
Unfortunately, the difference is not so great
(about 1%) and if you make only one transaction by
a small amount your capital will not increase much,
but if you make transactions permanently and by
a large amount, you can get rich very quickly.