helpful tips:
1) A better (IMO) skin is attached. I modified an existing skin to be better (you will need to extract this into a skins folder that you create in the mumble directory and then navigate to it and select it in the User Interface sections in Configuration)
Temp2.zip
2) Configure --> Check the "Advanced" box in the lower left.
3) Configure --> Audio Input
Please use a push to talk key. (under transmit, choose Push to Talk)
4) Configure --> User Interface
I like 'Stacked'
in the right corner, check 'Users above Channels'.
5) Configure --> Overlay
You can change or turn off the overlay if you wish