Running overnight, over 12 hours with full speed (~160KB/s) without any issue, now I can say this latest beta really fixed that proxy problem.
I haven turn on the Proxy Privacy features as yet for the pass test, turned on now to see what'll happen, continue full speed test.
For the information I did an upgrade like I usually did, keeping every settings, files intact by just replacing the EXE, so far no problem, so it's safe to do a direct upgrade rather than start fresh new.
uTorrent version: 2.2.1.24567 beta
OS: Windows XP SP3.
Intel Atom N230 + 1GB RAM.
DLink DGE-530T Gigabit network card
VPN: PrivateTracker
p/s: uTorrent rox