I just purchased the Logitech C310 Webcam mainly to use Skype.
When I try to use Skype, incoming sounds echo. I usually will also get what sounds like feedback. If I use the Skype echo test, my voice plays back fine.
I have tried capturing video with VLC and have the exact same issues.
I used guvcview as a quick test and that seemed to work fine. I also tested recording using Audacity and that played back fine.
I am mystified.
AMD Quad core A6 3620
Radeon HD 6530D
Ubuntu 12.10 with all updates