Did you send your torrent and settings to the devs? Same thing happens with default/clean settings? No. All torrent, default(clean) settings has a same problem. I tested utorrent 3.x on three systems. (Sandybridge i5-Win7x64Ult, Arrandale i3-Win7x64HomeP, Conroe Pentium-Win7x86Ult) I also test with real system, virtualbox WinXP, sandboxie.