Well, I'm using Avast since long time, uTorrent aswell, and this happened first time to me today (since avast program update) so I was thinking that the reason is here
I'm always downloading files like 600mb-1gb (I'm Linux fan, so many distributions to download
) and I dont have this problem since today. But nevermind, disabling P2P shield solves the problem, so everyting is ok now
Thanks for help Vlk
And keep it up, you are doing great work as Avast