I have it all the time since first beta in this topic. that setting set to 15, because suddenly all peers have [uTP] tag next to them, disabling that doesn't connect me to people at all. I understand this may be my fault (my brother switched router software from standard to tomato) but everything else is working like before. I tried disabling all options mentioned here (mapping ports, dht) which worked previously but nothing helped (even going back to stable version which makes me thing its my fault). i'm talking about upload, it sends few kbs (with fast peers up to 200-300kB) and then stops.... for 30-60 seconds. Download jumps too but it usuall progress much fater (which ruins my ratio). This is going for few weeks now.