Greetings. I ve noticed that for the last 2 months Opera is using almost constantly 100% of my upload bandwith when idle. It also happens when browsing, slowing down the loading of websites. I may have Opera open and idle at a specific website while I play a MMO game and will notice that ingame ping skyrockets. I minimize game and see that upload bandwith is 100% used by Opera for no reason. When I close opera, problem stops.
This happens only in Opera browser. When I use other browsers, problem goes away.