I have never heard of this. However first impressions lead me to believe that it is a client side problem.
What are the users ping, in which it happens to?
Does it happen to certain type of people? Admin,guest or even a certain channel?
Does the problem ever go away permanently for some users?
Well it happens to almost every user but I for sure hear it a lot and my ping is in the low 50 ms range. The server is in Dallas and I live in Virginia. The rest of my guys are mostly West Coast and I hear it from them but also some guys in places like Iowa and Wisconsin. I hear the issue from the same users unless they change their microphone. So yes, it may be client side but on the side of the person talking not the person listening. When I hear it when someone talks, I ask the others in channel if they heard it as well and they say yes.
It seems to happen in all channels and all types of people, unregistered, registered, what have you.
I think there may be one or two guys that I characteristically don't hear it from because they are very soft spoken guys. One of which I am thinking of recently moved from Boston to Washington and he continues to not set off the artifacting when he talks.
Otherwise everyone has it to some degree as far as I can tell
This thread seems to be the same issue but no resolution:http://sourceforge.net/projects/mumble/ ... ic/3496583