Just to tell you that I have downgraded to 1.7.4 because since I've installed 1.7.5 my up/download speed had decreased enormously and I cannot do anything else at Internet at the same time (as my whole bandwith was used by utorrent). Even being compeltelly ignorant about tecnic details I supose this must comme of a bug, because I have checked the firewall and ports are open and no other change has been made in my sentings between one version and another.