Comment 18 for bug 720707

Sometimes I ask myself if this issue is caused only because of Ubuntu One itself, because when I start downloading a single file using Firefox the hole network ping increases by a lot. This doesn't happen when using the same browser in MacOS or Windows, even by switching off the QoS service.

It is possible than my ISP and Ubuntu QoS technologies are unable to understand each other. The ISP temporarily leases bandwidth for a sort period of time when the network becames unresponsible; and then seems that Ubuntu chooses to use more bandwidth than what is natural to the network, making permanent congestion.