Hi Submarine!
I haven't seen this problem before! But try and open Task manager and see if the is any traffic (remember to close all other apps that makes use of your net). If there is traffic then it must be a bug in mute! You could also start one or more download(s) bigger then 300 mb if they complete it must be a bug in mute (But not a serious one).
Apart from that, mute works fine for me, i got the impression that there is a solid number of users running mute clients
Yes and the nummer is slowly rising