I received my cam last week and got everything all set up nice and easy. The first real use of the camera was my commute to work. Everything was fine. I then watched the video of myself leaving work and the camera was making a audible vibrating sound. I could hear this on the video and inside my car. I have waited some days just to see if I could figure out the problem for myself. It seems like the camera isn't really locking into the slide of the mount. It must be loose or something. The link is from this morning where the vibrating occurred again. You can skip to 1:40. You can hear the vibrating easily. I adjust the camera at 2:44 and the vibrating goes away. Just wondering is this is a known issue at all. Thanks.