Hi,
if you call with someone that doesnt uses a headset you oftenly get an echo. The windows client has a way to eliminate this echo by muting the person you call with while you are speaking. The linux client doesnt do this i think. Maybe this could be implented in skype linux.

odd, I don't even know this feature existed. Anyways, just kindly ask them to wear a headset then for now.

deltatux