I've already the latest Omega drivers (with an IGP 320M I cannot use official catalyst) and I've tried also DNA and some others catalyst modified but no success. I've no problems with other applications and older builds of utorrent, so I think it must be some bug introduced in the new build ^^ When (and if) I have time, i will try to post an advanced crash report, so any devs could esamine it and try to find what causes it. Thanks anyway for trying to help ^^