No, this not really the problem. For some reason 3.0 (and 2.2 actually too) gives less active torrents than 2.0.4 with the SAME settings. By the way, the bug with window size was finally fixed, personal thanks, it's only left to make utorrent remember the state of its window (if it was closed minimized, then it should start minimized) or to add "start minimized" in the options section.