Okay, since several from us in staff are getting bored with the same problem in PMs over and over again, I decided to inform our dear users through News again... The problem is about Nod32 and µTorrent 1.8x (aka HTTP 400 error)
µTorrent 1.8 Stable problems
It seams that some users are having problems with the new µTorrent 1.8 and get HTTP error 400 when trying to download something.
There seems to be a problem when using µTorrent in combination with the anti-virus program NOD32 prior to version 3 and the feature called IMON (Internet monitor). The solution is to either upgrade NOD32 to version 3.x or add µTorrent to IMON's exception list or to completly turn of the IMON feature in NOD32.
More info can be found in the official µTorrent forums: