Mumble Overlay Flickering

Hi,

Playing since release on Steam I use the Mumble Overlay to view online friends and my frame rate without issue. After (I suspect) the skybox update (I think that was the latest one) a few weeks ago the FPS counter and friends list started constantly flickering. I’ve reformatted and with nothing on the PC but Mumble, Steam and Rust with the same results. I’d be grateful for any suggestions as to how to fix this or if anyone else is having the same issue (I can’t be the only Mumble user here).

Thanks.