Sorry, instant fail. NO non-administrative program, especially one that engages in mass I/O over the internet, should require Admin rights to operate properly. Period. Nor will that help anyone who simply doesn't have Admin access. And no, it's not OK when games require this either, so don't bother going there; it's terrible practice and a security risk.
Additionally, I regularly try newer versions, every so often, to see if the situation has improved enough to drop 2.2.1. Again, sorry, but no; assumption fail.
Nor am I alone in my opinion or what I have seen, as a simple Google search for "utorrent 3. (issue OR problem)" immediately reveals.
Nor is uTorrent the best client, no matter WHAT version, for more extreme use cases, as already has been clearly established by many users, both here on BakaBT and elsewhere. Drop the fanboi-ism, please.